diff --git a/src/daemon/daemon.c b/src/daemon/daemon.c
index a0e8f2a..2c961b6 100644
--- a/src/daemon/daemon.c
+++ b/src/daemon/daemon.c
@@ -5,6 +5,7 @@
 
 */
 
+#undef _GNU_SOURCE
 #define _GNU_SOURCE
 #include <unistd.h>
 #define _POSIX_C_SOURCE 200809L