diff --git a/Makefile b/Makefile
index b6f83a5..0aa5e6a 100644
--- a/Makefile
+++ b/Makefile
@@ -1259,7 +1259,7 @@
 
 spl/u-boot-spl.bin: spl/u-boot-spl
 	@:
-spl/u-boot-spl: tools prepare
+spl/u-boot-spl: tools prepare $(if $(CONFIG_OF_SEPARATE),dts/dt.dtb)
 	$(Q)$(MAKE) obj=spl -f $(srctree)/scripts/Makefile.spl all
 
 spl/sunxi-spl.bin: spl/u-boot-spl