diff --git a/src/coreclr/nativeaot/Runtime/GCHelpers.cpp b/src/coreclr/nativeaot/Runtime/GCHelpers.cpp
index f9eafffdc3744c..2685a33faad092 100644
--- a/src/coreclr/nativeaot/Runtime/GCHelpers.cpp
+++ b/src/coreclr/nativeaot/Runtime/GCHelpers.cpp
@@ -655,7 +655,7 @@ static Object* GcAllocInternal(MethodTable* pEEType, uint32_t uFlags, uintptr_t
 //  numElements     -  number of array elements
 //  pTransitionFrame-  transition frame to make stack crawlable
 // Returns a pointer to the object allocated or NULL on failure.
-EXTERN_C void* RhpGcAlloc(MethodTable* pEEType, uint32_t uFlags, uintptr_t numElements, PInvokeTransitionFrame* pTransitionFrame)
+EXTERN_C void* RhpGcAlloc(MethodTable* pEEType, uint32_t uFlags, intptr_t numElements, PInvokeTransitionFrame* pTransitionFrame)
 {
     Thread* pThread = ThreadStore::GetCurrentThread();
 
diff --git a/src/coreclr/nativeaot/Runtime/portable.cpp b/src/coreclr/nativeaot/Runtime/portable.cpp
index d92b7f93597773..46fe1fbb7f7d79 100644
--- a/src/coreclr/nativeaot/Runtime/portable.cpp
+++ b/src/coreclr/nativeaot/Runtime/portable.cpp
@@ -32,9 +32,9 @@
 #include "GCMemoryHelpers.inl"
 
 #if defined(FEATURE_PORTABLE_HELPERS)
-EXTERN_C void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame);
+EXTERN_C void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame);
 
-static Object* AllocateObject(MethodTable* pEEType, uint32_t uFlags, uintptr_t numElements)
+static Object* AllocateObject(MethodTable* pEEType, uint32_t uFlags, intptr_t numElements)
 {
     Object* pObject = (Object*)RhpGcAlloc(pEEType, uFlags, numElements, nullptr);
     if (pObject == nullptr)
diff --git a/src/coreclr/runtime/amd64/AllocFast.S b/src/coreclr/runtime/amd64/AllocFast.S
index 02091bea31083e..fef27e309f0214 100644
--- a/src/coreclr/runtime/amd64/AllocFast.S
+++ b/src/coreclr/runtime/amd64/AllocFast.S
@@ -87,7 +87,7 @@ NESTED_ENTRY RhpNewObject, _TEXT, NoHandler
         xor         edx, edx    // numElements
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        C_FUNC(RhpGcAlloc)
 
         test        rax, rax
@@ -273,7 +273,7 @@ NESTED_ENTRY RhpNewVariableSizeObject, _TEXT, NoHandler
         // passing pTransitionFrame in rcx
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        C_FUNC(RhpGcAlloc)
 
         test        rax, rax
diff --git a/src/coreclr/runtime/amd64/AllocFast.asm b/src/coreclr/runtime/amd64/AllocFast.asm
index cda88f3bf8f1ec..1be1d2f2706f75 100644
--- a/src/coreclr/runtime/amd64/AllocFast.asm
+++ b/src/coreclr/runtime/amd64/AllocFast.asm
@@ -72,7 +72,7 @@ NESTED_ENTRY RhpNewObject, _TEXT
         xor         r8d, r8d        ; numElements
 
         ;; Call the rest of the allocation helper.
-        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         test        rax, rax
@@ -224,7 +224,7 @@ NESTED_ENTRY RhpNewVariableSizeObject, _TEXT
         ; passing pTransitionFrame in r9
 
         ; Call the rest of the allocation helper.
-        ; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         test        rax, rax
diff --git a/src/coreclr/runtime/arm/AllocFast.S b/src/coreclr/runtime/arm/AllocFast.S
index e57679edf72fb4..424fce1ceb61ef 100644
--- a/src/coreclr/runtime/arm/AllocFast.S
+++ b/src/coreclr/runtime/arm/AllocFast.S
@@ -162,7 +162,7 @@ NESTED_ENTRY RhpNewObject, _TEXT, NoHandler
 
         mov         r2, #0              // numElements
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         blx         C_FUNC(RhpGcAlloc)
 
         cbz         r0, LOCAL_LABEL(NewOutOfMemory)
@@ -369,7 +369,7 @@ NESTED_ENTRY RhpNewVariableSizeObject, _TEXT, NoHandler
         mov         r2, r1          // numElements
         mov         r1, #0          // uFlags
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         blx         C_FUNC(RhpGcAlloc)
 
         // Test for failure (NULL return).
@@ -414,7 +414,7 @@ NESTED_ENTRY RhpNewArrayFastAlign8, _TEXT, NoHandler
         mov         r2, r1                  // numElements
         mov         r1, #GC_ALLOC_ALIGN8    // uFlags
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         blx         C_FUNC(RhpGcAlloc)
 
         // Test for failure (NULL return).
diff --git a/src/coreclr/runtime/arm64/AllocFast.S b/src/coreclr/runtime/arm64/AllocFast.S
index 33e8c83ae3ef1f..19d5c5a3ebd35e 100644
--- a/src/coreclr/runtime/arm64/AllocFast.S
+++ b/src/coreclr/runtime/arm64/AllocFast.S
@@ -76,7 +76,7 @@ LOCAL_LABEL(RhpNewFast_RarePath):
         mov         w2, 0               // numElements
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl          C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer on success.
@@ -258,7 +258,7 @@ LOCAL_LABEL(ArraySizeOverflow):
         mov         x2, x1              // numElements
         mov         x1, #0              // uFlags
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl          C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer and length on success.
diff --git a/src/coreclr/runtime/arm64/AllocFast.asm b/src/coreclr/runtime/arm64/AllocFast.asm
index ad67eb2107e737..753117f0a499c4 100644
--- a/src/coreclr/runtime/arm64/AllocFast.asm
+++ b/src/coreclr/runtime/arm64/AllocFast.asm
@@ -75,7 +75,7 @@ RhpNewFast_RarePath
         mov         w2, #0              ; numElements
 
         ;; Call the rest of the allocation helper.
-        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl          RhpGcAlloc
 
         cbz         x0, NewOutOfMemory
@@ -229,7 +229,7 @@ ArraySizeOverflow
         mov         x2, x1              ; numElements
         mov         x1, #0              ; uFlags
 
-        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl          RhpGcAlloc
 
         cbz         x0, RhpNewVariableSizeObject_OutOfMemory
diff --git a/src/coreclr/runtime/i386/AllocFast.S b/src/coreclr/runtime/i386/AllocFast.S
index 529a5142bcf2fd..3eec8fb8d0114b 100644
--- a/src/coreclr/runtime/i386/AllocFast.S
+++ b/src/coreclr/runtime/i386/AllocFast.S
@@ -51,7 +51,7 @@ LEAF_ENTRY RhpNewObject, _TEXT
         push        ecx
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         add         esp, 16
@@ -249,7 +249,7 @@ NESTED_ENTRY RhpNewVariableSizeObject, _TEXT, NoHandler
         push        0                                               // Flags
         push        ecx                                             // MethodTable
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         add         esp, 16
diff --git a/src/coreclr/runtime/i386/AllocFast.asm b/src/coreclr/runtime/i386/AllocFast.asm
index 7bb4d6ee6544f4..4afd486f05e09b 100644
--- a/src/coreclr/runtime/i386/AllocFast.asm
+++ b/src/coreclr/runtime/i386/AllocFast.asm
@@ -55,7 +55,7 @@ FASTCALL_FUNC   RhpNewObject, 8
         push        ecx
 
         ;; Call the rest of the allocation helper.
-        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ;; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         test        eax, eax
@@ -241,7 +241,7 @@ FASTCALL_FUNC RhpNewVariableSizeObject, 8
         push        0                                               ; Flags
         push        ecx                                             ; MethodTable
 
-        ; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        ; void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call        RhpGcAlloc
 
         test        eax, eax
diff --git a/src/coreclr/runtime/loongarch64/AllocFast.S b/src/coreclr/runtime/loongarch64/AllocFast.S
index 1a55fa7da9e510..5093e9db1cb64f 100644
--- a/src/coreclr/runtime/loongarch64/AllocFast.S
+++ b/src/coreclr/runtime/loongarch64/AllocFast.S
@@ -72,7 +72,7 @@ LOCAL_LABEL(RhpNewFast_RarePath):
         ori  $a2, $zero, 0 // numElements
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl  C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer on success.
@@ -228,7 +228,7 @@ LOCAL_LABEL(ArraySizeOverflow):
         ori  $a2, $a1, 0              // numElements
         ori  $a1, $zero, 0            // uFlags
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         bl  C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer and length on success.
diff --git a/src/coreclr/runtime/riscv64/AllocFast.S b/src/coreclr/runtime/riscv64/AllocFast.S
index 5fc3d69987e42f..917b5e81395e2d 100644
--- a/src/coreclr/runtime/riscv64/AllocFast.S
+++ b/src/coreclr/runtime/riscv64/AllocFast.S
@@ -86,7 +86,7 @@ LOCAL_LABEL(RhpNewFast_RarePath):
         li  a2, 0 // numElements
 
         // Call the rest of the allocation helper.
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call  C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer on success.
@@ -262,7 +262,7 @@ LOCAL_LABEL(ArraySizeOverflow):
         mv   a2, a1              // numElements
         li   a1, 0                // uFlags
 
-        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, uintptr_t numElements, void * pTransitionFrame)
+        // void* RhpGcAlloc(MethodTable *pEEType, uint32_t uFlags, intptr_t numElements, void * pTransitionFrame)
         call  C_FUNC(RhpGcAlloc)
 
         // Set the new object's MethodTable pointer and length on success.
diff --git a/src/coreclr/vm/gchelpers.cpp b/src/coreclr/vm/gchelpers.cpp
index bc451012c3779f..e89fbf45508569 100644
--- a/src/coreclr/vm/gchelpers.cpp
+++ b/src/coreclr/vm/gchelpers.cpp
@@ -114,7 +114,7 @@ EXTERN_C Object* RhpGcAlloc(MethodTable* pMT, GC_ALLOC_FLAGS uFlags, uintptr_t n
     return OBJECTREFToObject(newobj);
 }
 
-EXTERN_C Object* RhpGcAllocMaybeFrozen(MethodTable* pMT, uintptr_t numElements, TransitionBlock* pTransitionBlock)
+EXTERN_C Object* RhpGcAllocMaybeFrozen(MethodTable* pMT, intptr_t numElements, TransitionBlock* pTransitionBlock)
 {
     OBJECTREF newobj = NULL;