diff --git a/binding/default_validator.go b/binding/default_validator.go
index 8203bcaa..116fbae9 100644
--- a/binding/default_validator.go
+++ b/binding/default_validator.go
@@ -27,14 +27,14 @@ func (err SliceValidationError) Error() string {
 	}
 
 	var b strings.Builder
-	for i := range len(err) {
-		if err[i] != nil {
-			if b.Len() > 0 {
-				b.WriteString("\n")
-			}
-			b.WriteString("[" + strconv.Itoa(i) + "]: " + err[i].Error())
+	for i, e := range err {
+	if e != nil {
+		if b.Len() > 0 {
+			b.WriteString("\n")
 		}
+		b.WriteString("[" + strconv.Itoa(i) + "]: " + e.Error())
 	}
+}
 	return b.String()
 }