diff --git a/src/cms-colord.c b/src/cms-colord.c
index 6056407bc..691b2e615 100644
--- a/src/cms-colord.c
+++ b/src/cms-colord.c
@@ -24,7 +24,6 @@
 #include <config.h>
 #endif
 
-#define _GNU_SOURCE
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdio.h>