1 files changed, 3 insertions, 0 deletions

diff --git a/cbs.h b/cbs.h
index c7eab15..b16128b 100644
--- a/cbs.h
+++ b/cbs.h
@@ -50,6 +50,9 @@
 #	error "Non-POSIX platform detected"
 #endif
 
+/* Required for st_mtim */
+#define _POSIX_C_SOURCE 200809L
+
 #include <sys/stat.h>
 #include <sys/wait.h>