diff --git a/include/llvm/Support/Format.h b/include/llvm/Support/Format.h
index 340f51735e8..164ad6a3533 100644
--- a/include/llvm/Support/Format.h
+++ b/include/llvm/Support/Format.h
@@ -25,9 +25,6 @@
 
 #include <cassert>
 #include <cstdio>
-#ifdef WIN32
-#define snprintf _snprintf
-#endif
 
 namespace llvm {