diff --git a/llvm/utils/TableGen/ARMDecoderEmitter.cpp b/llvm/utils/TableGen/ARMDecoderEmitter.cpp
index 4bb46026d450..5fb8b6bfb232 100644
--- a/llvm/utils/TableGen/ARMDecoderEmitter.cpp
+++ b/llvm/utils/TableGen/ARMDecoderEmitter.cpp
@@ -100,7 +100,7 @@ static const char *stringForARMFormat(ARMFormat form) {
 #undef ENTRY
 }
 
-typedef enum {
+enum {
   IndexModeNone = 0,
   IndexModePre  = 1,
   IndexModePost = 2,