diff --git a/compiler-rt/lib/profile/PGOProfiling.c b/compiler-rt/lib/profile/PGOProfiling.c
index 310801b67a11..737ba79a7de0 100644
--- a/compiler-rt/lib/profile/PGOProfiling.c
+++ b/compiler-rt/lib/profile/PGOProfiling.c
@@ -10,12 +10,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-// Explicitly request that the format macros like PRIu64 be enabled if they
-// haven't already been enabled.
-#ifndef __STDC_FORMAT_MACROS
-#define __STDC_FORMAT_MACROS 1
-#endif
-
 #if !defined(__APPLE__)
 #include <inttypes.h>
 #endif