diff --git a/platform/sky/Makefile.sky b/platform/sky/Makefile.sky
index 0cbfdbbef..4fc4daf9e 100644
--- a/platform/sky/Makefile.sky
+++ b/platform/sky/Makefile.sky
@@ -10,5 +10,6 @@ endif
 
 include $(CONTIKI)/platform/sky/Makefile.common
 
-MODULES += core/net/ipv6 core/net/ipv4 core/net/rime core/net/mac/contikimac \
+MODULES += core/net/ipv6 core/net/ipv4 core/net/rime \
+           core/net/mac/contikimac core/net/mac/cxmac \
            dev/cc2420 dev/sht11 dev/ds2411