add mangle
diff --git a/userspace/arptables/extensions/Makefile b/userspace/arptables/extensions/Makefile
index 5db8710..b9c0b54 100644
--- a/userspace/arptables/extensions/Makefile
+++ b/userspace/arptables/extensions/Makefile
@@ -1,6 +1,6 @@
 #! /usr/bin/make
 
-EXT_FUNC+=standard
+EXT_FUNC+=standard mangle
 EXT_OBJS+=$(foreach T,$(EXT_FUNC), extensions/arpt_$(T).o)
 
 extensions/ebt_%.o: extensions/arpt_%.c include/arptables.h include/arptables_common.h