diff --git a/include/functions.inc.php b/include/functions.inc.php
index 4b276b662..015eb8849 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -392,7 +392,7 @@ function str2url($str)
 
   if (empty($res))
   {
-    $res = $raw;
+    $res = str_replace(' ','_', $raw);
   }
 
   return $res;