diff --git a/logger/sql.go b/logger/sql.go
index 138a35ec..0ffe6b41 100644
--- a/logger/sql.go
+++ b/logger/sql.go
@@ -48,8 +48,6 @@ func ExplainSQL(sql string, numericPlaceholder *regexp.Regexp, escaper string, a
 			} else {
 				vars[idx] = "NULL"
 			}
-		case fmt.Stringer:
-			vars[idx] = escaper + strings.Replace(fmt.Sprintf("%v", v), escaper, "\\"+escaper, -1) + escaper
 		case driver.Valuer:
 			reflectValue := reflect.ValueOf(v)
 			if v != nil && reflectValue.IsValid() && ((reflectValue.Kind() == reflect.Ptr && !reflectValue.IsNil()) || reflectValue.Kind() != reflect.Ptr) {