diff --git a/target/linux/gemini/image/Makefile b/target/linux/gemini/image/Makefile
index 24402f6a9b..b4daa92670 100644
--- a/target/linux/gemini/image/Makefile
+++ b/target/linux/gemini/image/Makefile
@@ -7,8 +7,8 @@
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/image.mk
 
-define Build/copy-kernel
-	$(MAKE) -C copy-kernel CROSS_COMPILE=$(TARGET_CROSS)
+define Build/copy-kernel.bin
+	$(call locked,$(MAKE) -C copy-kernel CROSS_COMPILE=$(TARGET_CROSS) O=$(KDIR),gemini-copy-kernel.bin)
 endef
 
 # Cook a "WRGG" image, this board is apparently one in the D-Link
@@ -93,11 +93,10 @@ endef
 define Build/storlink-default-images
 	mkdir -p $@.tmp
 
-	$(call Build/copy-kernel)
 	# "App" partition is the rootfs
 	mv $@ $@.tmp/hddapp.tgz
 	# 256 bytes copy routine
-	dd if=copy-kernel/copy-kernel.bin of=$@.tmp/zImage
+	dd if=$(KDIR)/copy-kernel.bin of=$@.tmp/zImage
 	$(call Image/pad-to,$@.tmp/zImage,512)
 	# Copy first part of the kernel into zImage
 	dd if=$(IMAGE_KERNEL) of=$@.tmp/zImage bs=1 seek=512 count=2096640
@@ -182,6 +181,8 @@ TARGET_DEVICES += dlink_dns-313
 
 # Default images setup used by the StorLink reference designs
 define Device/storlink-reference
+	COMPILE := copy-kernel-$(1).bin
+	COMPILE/copy-kernel-$(1).bin := copy-kernel.bin
 	IMAGES := factory.bin
 	IMAGE/factory.bin := append-rootfs | pad-rootfs | pad-to 6144k | \
 		storlink-default-images $(1)
diff --git a/target/linux/gemini/image/copy-kernel/Makefile b/target/linux/gemini/image/copy-kernel/Makefile
index 155c35968c..9ba283bb01 100644
--- a/target/linux/gemini/image/copy-kernel/Makefile
+++ b/target/linux/gemini/image/copy-kernel/Makefile
@@ -13,20 +13,26 @@ OBJCOPY		:= $(CROSS_COMPILE)objcopy
 
 BIN_FLAGS	:= -O binary -S
 
-all: copy-kernel.bin
+SRC_DIR		:= $(CURDIR)/
+OUT_DIR		:= $(if $(O),$(if $(patsubst %/,,$(O)),$(O)/,$(O)),$(SRC_DIR))
+
+all: $(OUT_DIR)copy-kernel.bin
 
 # Don't build dependencies, this may die if $(CC) isn't gcc
 dep:
 
 install:
 
-%.o : %.S
+$(OUT_DIR):
+	mkdir -p $(OUT_DIR)
+
+$(OUT_DIR)%.o : $(SRC_DIR)%.S | $(OUT_DIR)
 	$(AS) $(ASFLAGS) -k -o $@ $<
 
-%.bin: %.o
+$(OUT_DIR)%.bin: $(OUT_DIR)%.o
 	$(OBJCOPY) $(BIN_FLAGS) $< $@
 
 mrproper: clean
 
 clean:
-	rm -f copy-kernel.bin copy-kernel.o
+	rm -f $(OUT_DIR)copy-kernel.bin $(OUT_DIR)copy-kernel.o