diff --git a/package/network/utils/iptables/Makefile b/package/network/utils/iptables/Makefile
index 55f3a387bd..03f692ec68 100644
--- a/package/network/utils/iptables/Makefile
+++ b/package/network/utils/iptables/Makefile
@@ -375,6 +375,10 @@ define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/xtables.pc $(1)/usr/lib/pkgconfig/
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/libip*tc.pc $(1)/usr/lib/pkgconfig/
+
+	# XXX: needed by firewall3
+	$(INSTALL_DIR) $(1)/usr/lib/iptables
+	$(CP) $(PKG_BUILD_DIR)/extensions/libext*.a $(1)/usr/lib/iptables/
 endef
 
 define Package/iptables/install