diff --git a/core/conf/config.go b/core/conf/config.go
index d53a79d6..739aaf5d 100644
--- a/core/conf/config.go
+++ b/core/conf/config.go
@@ -33,7 +33,7 @@ type fieldInfo struct {
 }
 
 // FillDefault fills the default values for the given v,
-// and the premise is that the value of v must be guaranteed to be empty
+// and the premise is that the value of v must be guaranteed to be empty.
 func FillDefault(v any) error {
 	return fillDefaultUnmarshaler.Unmarshal(map[string]any{}, v)
 }