diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index b3bacf3..a3cf112 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -146,11 +146,6 @@
 %.dtb: scripts
 	$(Q)$(MAKE) $(build)=$(dts) $(dts)/$@
 
-dtbs: scripts
-	$(Q)$(MAKE) $(build)=$(dts) dtbs
-
-KBUILD_DTBS := dtbs
-
 KBUILD_IMAGE ?= $(KBUILD_BINARY)
 
 #####
diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
index 348b814..7ccb2f8 100644
--- a/arch/mips/dts/Makefile
+++ b/arch/mips/dts/Makefile
@@ -4,9 +4,12 @@
 
 dtb-y += ${BUILTIN_DTB}.dtb
 
+.SECONDARY: $(obj)/$(BUILTIN_DTB).dtb.S
+.SECONDARY: $(patsubst %,$(obj)/%.S,$(dtb-y))
+
 targets += dtbs
 targets += $(dtb-y)
 
-dtbs: $(addprefix $(obj)/, $(dtb-y))
+extra-y += $(dtb-y)
 
 clean-files := *.dtb *.dtb.S