diff --git a/libclc/utils/prepare-builtins.cpp b/libclc/utils/prepare-builtins.cpp
index 2acf4ee96235..e0ad6a3c9502 100644
--- a/libclc/utils/prepare-builtins.cpp
+++ b/libclc/utils/prepare-builtins.cpp
@@ -7,6 +7,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/system_error.h"
 #include "llvm/Support/ErrorOr.h"