diff --git a/flang-rt/lib/runtime/__ppc_intrinsics.f90 b/flang-rt/lib/runtime/__ppc_intrinsics.f90
index b3ff33b0619ff..1c917cefec0a0 100644
--- a/flang-rt/lib/runtime/__ppc_intrinsics.f90
+++ b/flang-rt/lib/runtime/__ppc_intrinsics.f90
@@ -7,6 +7,7 @@
 !===------------------------------------------------------------------------===!
 
 module __ppc_intrinsics
+  use __ppc_types ! implicit dependencies, made explicit for CMake
 
   private
 
diff --git a/flang-rt/lib/runtime/__ppc_types.f90 b/flang-rt/lib/runtime/__ppc_types.f90
index 7a7c7898ebf80..d98dd80182839 100644
--- a/flang-rt/lib/runtime/__ppc_types.f90
+++ b/flang-rt/lib/runtime/__ppc_types.f90
@@ -7,6 +7,7 @@
 !===------------------------------------------------------------------------===!
 
 module __ppc_types
+  use __fortran_builtins ! implicit dependency, made explicit for CMake
   implicit none
 
   ! Set PRIVATE by default to explicitly only export what is meant
diff --git a/flang-rt/lib/runtime/mma.f90 b/flang-rt/lib/runtime/mma.f90
index 4c41822e000a3..04f9a35b5d5aa 100644
--- a/flang-rt/lib/runtime/mma.f90
+++ b/flang-rt/lib/runtime/mma.f90
@@ -7,6 +7,8 @@
 !===------------------------------------------------------------------------===!
 
 module mma
+  use __ppc_types ! implicit dependencies, made explicit for CMake
+
   implicit none
   private