diff --git a/include/llvm/Support/Win64EH.h b/include/llvm/Support/Win64EH.h
index 17d416fe0e7..dc9156be568 100644
--- a/include/llvm/Support/Win64EH.h
+++ b/include/llvm/Support/Win64EH.h
@@ -16,6 +16,8 @@
 #ifndef LLVM_SUPPORT_WIN64EH_H
 #define LLVM_SUPPORT_WIN64EH_H
 
+#include "llvm/Support/DataTypes.h"
+
 namespace llvm {
 namespace Win64EH {