diff --git a/lib/Target/Lanai/LanaiInstrInfo.h b/lib/Target/Lanai/LanaiInstrInfo.h
index f07fede67a4..fe22fde2470 100644
--- a/lib/Target/Lanai/LanaiInstrInfo.h
+++ b/lib/Target/Lanai/LanaiInstrInfo.h
@@ -15,6 +15,7 @@
 #define LLVM_LIB_TARGET_LANAI_LANAIINSTRINFO_H
 
 #include "LanaiRegisterInfo.h"
+#include "MCTargetDesc/LanaiMCTargetDesc.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
 
 #define GET_INSTRINFO_HEADER