diff --git a/openwrt/target/linux/image/ar7/Makefile b/openwrt/target/linux/image/ar7/Makefile
index 3a803cbd8..2cdf18d66 100644
--- a/openwrt/target/linux/image/ar7/Makefile
+++ b/openwrt/target/linux/image/ar7/Makefile
@@ -84,13 +84,13 @@ install: $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(FS)-$(1).bin
 endef
 
 define sercomm_template
-$(BIN_DIR)/openwrt-$(1)-$(KERNEL)-$(FS).bin: $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(FS).bin
+$(BIN_DIR)/openwrt-$(1)-$(KERNEL)-$(FS).img: $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(FS).bin
 	cat sercomm/adam2.bin "$$^" > "$$@.tmp"
 	dd if=sercomm/$(1) of="$$@.tmp" bs=$$$$((0x3e0000 - 80)) seek=1 conv=notrunc
 	$(STAGING_DIR)/bin/dgfirmware -f -w "$$@" "$$@.tmp"
 	rm -f "$$@.tmp"
 
-install: $(BIN_DIR)/openwrt-$(1)-$(KERNEL)-$(FS).bin
+install: $(BIN_DIR)/openwrt-$(1)-$(KERNEL)-$(FS).img
 endef
 
 $(eval $(call sercomm_template,dg834))