diff --git a/flang/lib/Decimal/CMakeLists.txt b/flang/lib/Decimal/CMakeLists.txt
index 5c5a498f1a3ca..a81d329b4a5de 100644
--- a/flang/lib/Decimal/CMakeLists.txt
+++ b/flang/lib/Decimal/CMakeLists.txt
@@ -11,6 +11,7 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 
   set(LLVM_COMMON_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../cmake")
   set(LLVM_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../llvm/cmake")
+  set(CLANG_CMAKE_UTILS "${FLANG_SOURCE_DIR}/../clang/cmake")
 
   # Add path for custom modules
   list(INSERT CMAKE_MODULE_PATH 0
@@ -20,8 +21,10 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
     "${LLVM_COMMON_CMAKE_UTILS}/Modules"
     "${LLVM_CMAKE_UTILS}"
     "${LLVM_CMAKE_UTILS}/modules"
+    "${CLANG_CMAKE_UTILS}/modules"
     )
 
+  include(AddClang)
   include(AddLLVM)
   include(AddFlang)
   include(HandleLLVMOptions)