diff --git a/core/Makefile b/core/Makefile
index 1846a88..ead6754 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -4312,15 +4312,18 @@
 dalvikfiles: $(INTERNAL_DALVIK_MODULES)
 
 ifeq ($(BUILD_QEMU_IMAGES),true)
-INSTALLED_QEMU_SYSTEMIMAGE := $(PRODUCT_OUT)/system-qemu.img
 MK_QEMU_IMAGE_SH := device/generic/goldfish/tools/mk_qemu_image.sh
 SGDISK_HOST := $(HOST_OUT_EXECUTABLES)/sgdisk
+
+ifdef INSTALLED_SYSTEMIMAGE_TARGET
+INSTALLED_QEMU_SYSTEMIMAGE := $(PRODUCT_OUT)/system-qemu.img
 $(INSTALLED_QEMU_SYSTEMIMAGE): $(INSTALLED_SYSTEMIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST) $(SIMG2IMG)
 	@echo Create system-qemu.img
 	(export SGDISK=$(SGDISK_HOST) SIMG2IMG=$(SIMG2IMG); $(MK_QEMU_IMAGE_SH) ${PRODUCT_OUT}/system.img)
 
 systemimage: $(INSTALLED_QEMU_SYSTEMIMAGE)
 droidcore: $(INSTALLED_QEMU_SYSTEMIMAGE)
+endif
 ifdef INSTALLED_VENDORIMAGE_TARGET
 INSTALLED_QEMU_VENDORIMAGE := $(PRODUCT_OUT)/vendor-qemu.img
 $(INSTALLED_QEMU_VENDORIMAGE): $(INSTALLED_VENDORIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST) $(SIMG2IMG)