diff --git a/lib/Target/ARM/ARMInstrInfo.h b/lib/Target/ARM/ARMInstrInfo.h
index da22521b830..cd19ae15bf6 100644
--- a/lib/Target/ARM/ARMInstrInfo.h
+++ b/lib/Target/ARM/ARMInstrInfo.h
@@ -16,6 +16,7 @@
 
 #include "llvm/Target/TargetInstrInfo.h"
 #include "ARMRegisterInfo.h"
+#include "ARM.h"
 
 namespace llvm {
   class ARMSubtarget;