diff --git a/tools/smartflash/Makefile b/tools/smartflash/Makefile
index 3bd3903..b9770df 100644
--- a/tools/smartflash/Makefile
+++ b/tools/smartflash/Makefile
@@ -15,7 +15,7 @@ setup:
 	@echo Now run ./smartflash
 
 clean:
-	rm firmware.bin generate-keys
+	rm -f firmware.bin generate-keys
 	rm -rf files