diff --git a/Makefile b/Makefile
index fb8e9eb..45bd2ae 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,7 @@ objs = cache.o rfc1035.o util.o option.o forward.o network.o \
        domain.o dnssec.o blockdata.o
 
 hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
-       dns-protocol.h radv-protocol.h
+       dns-protocol.h radv-protocol.h ip6addr.h
 
 all : $(BUILDDIR)
 	@cd $(BUILDDIR) && $(MAKE) \