diff --git a/src/coreclr/inc/corcompile.h b/src/coreclr/inc/corcompile.h
index e4baf3423fca28..014509221a0d62 100644
--- a/src/coreclr/inc/corcompile.h
+++ b/src/coreclr/inc/corcompile.h
@@ -186,7 +186,6 @@ enum EncodeMethodSigFlags
 
 enum EncodeFieldSigFlags
 {
-    ENCODE_FIELD_SIG_IndexInsteadOfToken        = 0x08,
     ENCODE_FIELD_SIG_MemberRefToken             = 0x10,
     ENCODE_FIELD_SIG_OwnerType                  = 0x40,
 };
diff --git a/src/coreclr/inc/readytorun.h b/src/coreclr/inc/readytorun.h
index 41a4aa251fa742..88219146a123a4 100644
--- a/src/coreclr/inc/readytorun.h
+++ b/src/coreclr/inc/readytorun.h
@@ -184,7 +184,6 @@ enum ReadyToRunMethodSigFlags
 
 enum ReadyToRunFieldSigFlags
 {
-    READYTORUN_FIELD_SIG_IndexInsteadOfToken    = 0x08,
     READYTORUN_FIELD_SIG_MemberRefToken         = 0x10,
     READYTORUN_FIELD_SIG_OwnerType              = 0x40,
 };
diff --git a/src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.cs b/src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.cs
index a37945534865bf..0ca8b74c85229b 100644
--- a/src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.cs
+++ b/src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.cs
@@ -57,7 +57,6 @@ public enum ReadyToRunMethodSigFlags : byte
     [Flags]
     public enum ReadyToRunFieldSigFlags : byte
     {
-        READYTORUN_FIELD_SIG_IndexInsteadOfToken = 0x08,
         READYTORUN_FIELD_SIG_MemberRefToken = 0x10,
         READYTORUN_FIELD_SIG_OwnerType = 0x40,
     }
diff --git a/src/coreclr/vm/zapsig.cpp b/src/coreclr/vm/zapsig.cpp
index 577acbf485a2cb..28216cb27d1b84 100644
--- a/src/coreclr/vm/zapsig.cpp
+++ b/src/coreclr/vm/zapsig.cpp
@@ -1024,46 +1024,32 @@ FieldDesc * ZapSig::DecodeField(Module *pReferencingModule,
         IfFailThrow(sig.SkipExactlyOne());
     }
 
-    if (fieldFlags & ENCODE_FIELD_SIG_IndexInsteadOfToken)
-    {
-        // get the field desc using index
-        uint32_t fieldIndex;
-        IfFailThrow(sig.GetData(&fieldIndex));
-
-        _ASSERTE(pOwnerMT != NULL);
+    RID rid;
+    IfFailThrow(sig.GetData(&rid));
 
-        pField = pOwnerMT->GetFieldDescByIndex(fieldIndex);
-        _ASSERTE(pOwnerMT == pField->GetApproxEnclosingMethodTable());
-    }
-    else
+    if (fieldFlags & ENCODE_FIELD_SIG_MemberRefToken)
     {
-        RID rid;
-        IfFailThrow(sig.GetData(&rid));
-
-        if (fieldFlags & ENCODE_FIELD_SIG_MemberRefToken)
+        if (pOwnerMT == NULL)
         {
-            if (pOwnerMT == NULL)
-            {
-                TypeHandle th;
-                MethodDesc * pMD = NULL;
-                FieldDesc * pFD = NULL;
+            TypeHandle th;
+            MethodDesc * pMD = NULL;
+            FieldDesc * pFD = NULL;
 
-                MemberLoader::GetDescFromMemberRef(pInfoModule, TokenFromRid(rid, mdtMemberRef), &pMD, &pFD, NULL, FALSE, &th);
-                _ASSERTE(pFD != NULL);
+            MemberLoader::GetDescFromMemberRef(pInfoModule, TokenFromRid(rid, mdtMemberRef), &pMD, &pFD, NULL, FALSE, &th);
+            _ASSERTE(pFD != NULL);
 
-                pField = pFD;
-            }
-            else
-            {
-                pField = MemberLoader::GetFieldDescFromMemberRefAndType(pInfoModule, TokenFromRid(rid, mdtMemberRef), pOwnerMT);
-            }
+            pField = pFD;
         }
         else
         {
-            _ASSERTE(pInfoModule->IsFullModule());
-            pField = MemberLoader::GetFieldDescFromFieldDef(static_cast<Module*>(pInfoModule), TokenFromRid(rid, mdtFieldDef), FALSE);
+            pField = MemberLoader::GetFieldDescFromMemberRefAndType(pInfoModule, TokenFromRid(rid, mdtMemberRef), pOwnerMT);
         }
     }
+    else
+    {
+        _ASSERTE(pInfoModule->IsFullModule());
+        pField = MemberLoader::GetFieldDescFromFieldDef(static_cast<Module*>(pInfoModule), TokenFromRid(rid, mdtFieldDef), FALSE);
+    }
 
     if (ppTH != NULL)
         *ppTH = (pOwnerMT != NULL) ? pOwnerMT : pField->GetApproxEnclosingMethodTable();