diff --git a/modules/user.module b/modules/user.module
index 4ade502e4061c3e60dec93076b144baefb221c36..e6efac5bdae94d9d2995193c14b2ff42ff359c8f 100644
--- a/modules/user.module
+++ b/modules/user.module
@@ -1930,7 +1930,7 @@ function _user_forms(&$edit, $account, $category, $hook = 'form') {
  */
 function user_autocomplete($string) {
   $matches = array();
-  $result = db_query_range('SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER("%s%%")', $string, 0, 10);
+  $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER('%s%%')", $string, 0, 10);
   while ($user = db_fetch_object($result)) {
     $matches[$user->name] = check_plain($user->name);
   }
diff --git a/modules/user/user.module b/modules/user/user.module
index 4ade502e4061c3e60dec93076b144baefb221c36..e6efac5bdae94d9d2995193c14b2ff42ff359c8f 100644
--- a/modules/user/user.module
+++ b/modules/user/user.module
@@ -1930,7 +1930,7 @@ function _user_forms(&$edit, $account, $category, $hook = 'form') {
  */
 function user_autocomplete($string) {
   $matches = array();
-  $result = db_query_range('SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER("%s%%")', $string, 0, 10);
+  $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER('%s%%')", $string, 0, 10);
   while ($user = db_fetch_object($result)) {
     $matches[$user->name] = check_plain($user->name);
   }