diff --git a/sc2/src/sc2code/libs/uio/stdio/stdio.c b/sc2/src/sc2code/libs/uio/stdio/stdio.c
index 915266589..a6a6c8680 100644
--- a/sc2/src/sc2code/libs/uio/stdio/stdio.c
+++ b/sc2/src/sc2code/libs/uio/stdio/stdio.c
@@ -32,7 +32,7 @@
 #else
 #	include <sys/stat.h>
 #	include <unistd.h>
-#	define _POSIX_THREAD_SAFEFUNCTIONS
+#	define _POSIX_THREAD_SAFE_FUNCTIONS
 		// for readdir_r
 #	include <dirent.h>
 #endif