diff --git a/engine/platform/linux/sys_linux.c b/engine/platform/linux/sys_linux.c
index fe022b22..210a727c 100644
--- a/engine/platform/linux/sys_linux.c
+++ b/engine/platform/linux/sys_linux.c
@@ -13,6 +13,7 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
 
+#define _GNU_SOURCE
 #include <time.h>
 #include <stdlib.h>
 #include <fcntl.h>