diff --git a/src/trace-tcp.c b/src/trace-tcp.c.new
index 5aba9d4d2d..1bcc40cdb1 100644
--- a/src/trace-tcp.c
+++ b/src/trace-tcp.c.new
@@ -21,9 +21,6 @@
 # include <config.h>
 #endif
 
-#undef _GNU_SOURCE
-#define _DEFAULT_SOURCE 1
-
 #include <string.h>
 #include <inttypes.h>
 #include <stdalign.h>