diff --git a/Makefile.inc b/Makefile.inc
index 2b5d742..f1f4646 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -310,7 +310,7 @@
 # arg1: input
 # arg2: output
 define cbfs-files-processor-config
-	$(eval $(2): $(1) $(obj)/build.h; \
+	$(eval $(2): $(1) $(obj)/build.h $(objutil)/kconfig/conf; \
 		+printf "    CREATE     $(2) (from $(1))\n"; \
 		printf "# This image was built using coreboot " > $(2).tmp && \
 		grep "\<COREBOOT_VERSION\>" $(obj)/build.h |cut -d\" -f2 >> $(2).tmp && \