diff --git a/acl/types.go b/acl/types.go
index c9bbfd3..c80c9cd 100644
--- a/acl/types.go
+++ b/acl/types.go
@@ -2,8 +2,12 @@ package acl
 
 const (
 	_ MatchType = iota
-	stringEqual
-	stringNotEqual
+
+	// StringEqual is a MatchType of string equality.
+	StringEqual
+
+	// StringNotEqual is a MatchType of string inequality.
+	StringNotEqual
 )
 
 const (
diff --git a/acl/wrappers.go b/acl/wrappers.go
index 94e420a..30c2ee3 100644
--- a/acl/wrappers.go
+++ b/acl/wrappers.go
@@ -83,9 +83,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 	if s.filter != nil {
 		switch s.filter.GetMatchType() {
 		case EACLRecord_FilterInfo_StringEqual:
-			res = stringEqual
+			res = StringEqual
 		case EACLRecord_FilterInfo_StringNotEqual:
-			res = stringNotEqual
+			res = StringNotEqual
 		}
 	}
 
@@ -102,9 +102,9 @@ func (s EACLFilterWrapper) MatchType() (res MatchType) {
 func (s EACLFilterWrapper) SetMatchType(v MatchType) {
 	if s.filter != nil {
 		switch v {
-		case stringEqual:
+		case StringEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringEqual)
-		case stringNotEqual:
+		case StringNotEqual:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_StringNotEqual)
 		default:
 			s.filter.SetMatchType(EACLRecord_FilterInfo_MatchUnknown)
diff --git a/acl/wrappers_test.go b/acl/wrappers_test.go
index a55db8c..b7dbbe0 100644
--- a/acl/wrappers_test.go
+++ b/acl/wrappers_test.go
@@ -9,7 +9,7 @@ import (
 func TestEACLFilterWrapper(t *testing.T) {
 	s := WrapFilterInfo(nil)
 
-	mt := stringEqual
+	mt := StringEqual
 	s.SetMatchType(mt)
 	require.Equal(t, mt, s.MatchType())