diff --git a/src/drivers/smmstore/Kconfig b/src/drivers/smmstore/Kconfig
index 4bb48f7e08..d7063dfad5 100644
--- a/src/drivers/smmstore/Kconfig
+++ b/src/drivers/smmstore/Kconfig
@@ -27,6 +27,6 @@ config SMMSTORE_REGION
 
 config SMMSTORE_FILENAME
 	string "SMM store file name"
-	default "smm store"
+	default "smm_store"
 
 endif