diff --git a/tools/event-gui.c b/tools/event-gui.c
index b5dd097c..36be8746 100644
--- a/tools/event-gui.c
+++ b/tools/event-gui.c
@@ -20,7 +20,6 @@
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  */
-#define _GNU_SOURCE
 #include <config.h>
 
 #include <linux/input.h>
diff --git a/tools/shared.c b/tools/shared.c
index c72ea857..7b354ec5 100644
--- a/tools/shared.c
+++ b/tools/shared.c
@@ -21,7 +21,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#define _GNU_SOURCE
 #include <config.h>
 
 #include <errno.h>