diff --git a/globals/refutil/refutil.go b/globals/refutil/refutil.go
index 1e7ac52ee..412ca8b55 100644
--- a/globals/refutil/refutil.go
+++ b/globals/refutil/refutil.go
@@ -92,6 +92,9 @@ func FilterMapByFieldList(mapData map[string]interface{}, fields []string) (vali
 }
 
 func IsValueEqual(value1, value2 interface{}) bool {
+	if value1 == nil || value2 == nil {
+		return value1 == value2
+	}
 	return Interface2String(value1) == Interface2String(value2)
 }