diff --git a/include/llvm/DerivedTypes.h b/include/llvm/DerivedTypes.h
index bb914b4bdf3..fe180008da3 100644
--- a/include/llvm/DerivedTypes.h
+++ b/include/llvm/DerivedTypes.h
@@ -19,6 +19,7 @@
 #define LLVM_DERIVED_TYPES_H
 
 #include "llvm/Type.h"
+#include "llvm/Support/DataTypes.h"
 
 namespace llvm {