diff --git a/match/max.go b/match/max.go
index d72f69e..032ffbf 100644
--- a/match/max.go
+++ b/match/max.go
@@ -15,7 +15,7 @@ func NewMax(l int) Max {
 
 func (self Max) Match(s string) bool {
 	var l int
-	for range s {
+	for _ = range s {
 		l += 1
 		if l > self.Limit {
 			return false
diff --git a/match/min.go b/match/min.go
index db57ac8..96b34cb 100644
--- a/match/min.go
+++ b/match/min.go
@@ -15,7 +15,7 @@ func NewMin(l int) Min {
 
 func (self Min) Match(s string) bool {
 	var l int
-	for range s {
+	for _ = range s {
 		l += 1
 		if l >= self.Limit {
 			return true
diff --git a/match/row.go b/match/row.go
index d0dcb35..820a60d 100644
--- a/match/row.go
+++ b/match/row.go
@@ -43,7 +43,7 @@ func (self Row) matchAll(s string) bool {
 
 func (self Row) lenOk(s string) bool {
 	var i int
-	for range s {
+	for _ = range s {
 		i++
 		if i >= self.RunesLength {
 			return true