diff --git a/CoreFoundation/Base.subproj/SwiftRuntime/CoreFoundation.h b/CoreFoundation/Base.subproj/SwiftRuntime/CoreFoundation.h
index 41eb6c16d7..74a654d5b4 100644
--- a/CoreFoundation/Base.subproj/SwiftRuntime/CoreFoundation.h
+++ b/CoreFoundation/Base.subproj/SwiftRuntime/CoreFoundation.h
@@ -34,7 +34,6 @@
 #include <setjmp.h>
 #include <signal.h>
 #include <stddef.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>