diff --git a/plat/socionext/uniphier/platform.mk b/plat/socionext/uniphier/platform.mk
index e6f510e0e4d98cb1054d5cf93f140b6b05775188..c91abb6be6bd7b9897241da3ecee052a38fc68a8 100644
--- a/plat/socionext/uniphier/platform.mk
+++ b/plat/socionext/uniphier/platform.mk
@@ -101,7 +101,7 @@ $(BUILD_PLAT)/bl1/uniphier_rotpk.o: $(ROTPK_HASH)
 $(BUILD_PLAT)/bl2/uniphier_rotpk.o: $(ROTPK_HASH)
 
 certificates: $(ROT_KEY)
-$(ROT_KEY):
+$(ROT_KEY): | $(BUILD_PLAT)
 	@echo "  OPENSSL $@"
 	$(Q)openssl genrsa 2048 > $@ 2>/dev/null