diff --git a/tools/cert_create/Makefile b/tools/cert_create/Makefile
index 4a6dd6b..accd5fc 100644
--- a/tools/cert_create/Makefile
+++ b/tools/cert_create/Makefile
@@ -79,7 +79,7 @@
 CC := gcc
 RM := rm -rf
 
-.PHONY: all clean
+.PHONY: all clean realclean
 
 all: clean ${BINARY}