diff --git a/include/llvm/Target/TargetInstrItineraries.h b/include/llvm/Target/TargetInstrItineraries.h
index 3be5b9513a2..9b2bb666c61 100644
--- a/include/llvm/Target/TargetInstrItineraries.h
+++ b/include/llvm/Target/TargetInstrItineraries.h
@@ -17,6 +17,7 @@
 #define LLVM_TARGET_TARGETINSTRITINERARIES_H
 
 #include "llvm/Support/Debug.h"
+#include <cassert>
 
 namespace llvm {