diff --git a/crayon_langs.class.php b/crayon_langs.class.php
index 651f55c8..ade1811b 100644
--- a/crayon_langs.class.php
+++ b/crayon_langs.class.php
@@ -337,7 +337,7 @@ function __construct($id, $name = NULL) {
 	// Override
 	function clean_id($id) {
         $id = CrayonUtil::space_to_hyphen( strtolower(trim($id)) );
-        return preg_replace('/[^\w-+#]/msi', '', $id);
+        return preg_replace('/[^\w\-+#]/msi', '', $id);
 	}
 
 	function ext($ext = NULL) {
@@ -543,4 +543,4 @@ function path($path = NULL) {
 	}
 }
 
-?>
\ No newline at end of file
+?>