diff --git a/base.go b/base.go
index 3d39f41..888a6ba 100644
--- a/base.go
+++ b/base.go
@@ -63,7 +63,7 @@ type Range struct {
 }
 
 // LanguageID - language identifier represented as a string.
-type LanguageID string
+type LanguageID = string
 
 const (
 	// LanguagePHP is the identifier for PHP documents.