diff --git a/batman-adv/Makefile b/batman-adv/Makefile
index 0b86592..4d2def3 100644
--- a/batman-adv/Makefile
+++ b/batman-adv/Makefile
@@ -73,13 +73,7 @@ NOSTDINC_FLAGS = \
 	-include $(PKG_BUILD_DIR)/compat-hacks.h \
 	-DBATADV_SOURCE_VERSION=\\\"$(PKG_VERSION)-openwrt-$(PKG_RELEASE)\\\"
 
-COMPAT_SOURCES = \
-	$(if $(CONFIG_BATMAN_ADV_MCAST),../../compat-sources/net/core/skbuff.o,) \
-	$(if $(CONFIG_BATMAN_ADV_MCAST),../../compat-sources/net/ipv4/igmp.o,) \
-	$(if $(CONFIG_BATMAN_ADV_MCAST),../../compat-sources/net/ipv6/mcast_snoop.o,) \
-
 define Build/Compile
-	+env "batman-adv-y=$(COMPAT_SOURCES)" \
 	$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		ARCH="$(LINUX_KARCH)" \
 		CROSS_COMPILE="$(TARGET_CROSS)" \