diff --git a/sites/all/modules/uif/uif.admin.inc b/sites/all/modules/uif/uif.admin.inc
index 643367a..40d397c 100644
--- a/sites/all/modules/uif/uif.admin.inc
+++ b/sites/all/modules/uif/uif.admin.inc
@@ -466,8 +466,8 @@ function uif_unique_username($name, $uid = 0) {
   $name = preg_replace('/^ +/', '', $name);
   $name = preg_replace('/ +$/', '', $name);
   
-  // Convert any other series of spaces to a single underscore
-  $name = preg_replace('/ +/', '_', $name);
+  // Convert any other series of spaces to a single space
+  $name = preg_replace('/ +/', ' ', $name);
   
   // If there's nothing left use a default
   $name = ('' === $name) ? t('user') : $name;