diff --git a/gnu/usr.bin/cc/cc_tools/auto-host.h b/gnu/usr.bin/cc/cc_tools/auto-host.h
index 3b5b0b87ab6..bd8af400a4c 100644
--- a/gnu/usr.bin/cc/cc_tools/auto-host.h
+++ b/gnu/usr.bin/cc/cc_tools/auto-host.h
@@ -87,7 +87,7 @@
 /* #undef ssize_t */
 
 /* Define if cpp should also search $prefix/include.  */
-#define PREFIX_INCLUDE_DIR "NONE/include"
+/* #define PREFIX_INCLUDE_DIR "NONE/include" */
 
 /* Define if you have the __argz_count function.  */
 /* #undef HAVE___ARGZ_COUNT */