diff --git a/lib/Serialization/ModuleManager.cpp b/lib/Serialization/ModuleManager.cpp
index b90ecc0..a5e81e8 100644
--- a/lib/Serialization/ModuleManager.cpp
+++ b/lib/Serialization/ModuleManager.cpp
@@ -12,8 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 #include "clang/Lex/ModuleMap.h"
-#include "clang/Serialization/ModuleManager.h"
 #include "clang/Serialization/GlobalModuleIndex.h"
+#include "clang/Serialization/ModuleManager.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"