diff --git a/posix/Dir.c b/posix/Dir.c
index 534718f..47c8d9a 100644
--- a/posix/Dir.c
+++ b/posix/Dir.c
@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200112L
 #include "../CgeFs.h"
 #include <sys/stat.h>
 #include <sys/types.h>
diff --git a/posix/Stat.c b/posix/Stat.c
index 84c5120..ac2983c 100644
--- a/posix/Stat.c
+++ b/posix/Stat.c
@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200112L
 #include "../CgeFs.h"
 #include <errno.h>
 #include <limits.h>