diff --git a/Tuprules.tup b/Tuprules.tup
index bdc9d69b..bc46ac1a 100644
--- a/Tuprules.tup
+++ b/Tuprules.tup
@@ -2,7 +2,7 @@
 
 CC = clang
 LD = clang
-CFLAGS = -Wall -g
+CFLAGS = -Wall -g -D_GNU_SOURCE
 LDFLAGS = -ljansson
 
 !cc = |> $(CC) $(CFLAGS) -c %f -o %o |>
diff --git a/server/req.c b/server/req.c
index 2795a3b6..e5dde7cf 100644
--- a/server/req.c
+++ b/server/req.c
@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>