diff --git a/src/security/vboot/Makefile.inc b/src/security/vboot/Makefile.inc
index 1b3568a..f5e7420 100644
--- a/src/security/vboot/Makefile.inc
+++ b/src/security/vboot/Makefile.inc
@@ -38,6 +38,8 @@
 		fwlib \
 		$(if $(CONFIG_SBOM_VBOOT),$$(abspath $$(dir $$(VBOOT_LIB_$(1))))/vboot_host.pc)
 
+.PHONY: $$(VBOOT_LIB_$(1))
+
 $(1)-srcs += $$(VBOOT_LIB_$(1))
 
 endef # vboot-for-stage