diff --git a/Makefile b/Makefile
index 713dba1d5f..c463a8ac96 100644
--- a/Makefile
+++ b/Makefile
@@ -352,7 +352,7 @@ $(obj)u-boot.img:	$(obj)u-boot.bin
 		-d $< $@
 
 $(obj)u-boot.imx:       $(obj)u-boot.bin
-		$(obj)tools/mkimage -n $(IMX_CONFIG) -T imximage \
+		$(obj)tools/mkimage -n  $(CONFIG_IMX_CONFIG) -T imximage \
 		-e $(CONFIG_SYS_TEXT_BASE) -d $< $@
 
 $(obj)u-boot.kwb:       $(obj)u-boot.bin