diff --git a/examples/webserver-ipv6/Makefile b/examples/webserver-ipv6/Makefile
index e50fa9e44..388605ac8 100644
--- a/examples/webserver-ipv6/Makefile
+++ b/examples/webserver-ipv6/Makefile
@@ -2,6 +2,7 @@ all: webserver6
 APPS=webserver
 
 UIP_CONF_IPV6=1
+DEFINES=WITH_UIP6
 
 CONTIKI = ../..
 include $(CONTIKI)/Makefile.include