diff --git a/configure.in b/configure.in
index 2c138eb226..8c5248479d 100644
--- a/configure.in
+++ b/configure.in
@@ -832,7 +832,6 @@ AC_INIT(configure.in)
             AC_DEFINE([HAVE_PACKET_FANOUT],[1],[Packet fanout support is available]),
             [],
             [[#include <linux/if_packet.h>]])
-        CFLAGS="${CFLAGS} -DUNITTESTS"
     ])