diff --git schema.inc schema.inc
index 8ba1298..1e1d4a0 100755
--- schema.inc
+++ schema.inc
@@ -200,7 +200,7 @@ class DatabaseSchema_sqlsrv extends DatabaseSchema {
   protected function createIndexSql($table, $name, $fields) {
     // Here we need to create a computed PERSISTENT column, and index that, when
     // the type is not allowed in an index.
-    return 'CREATE INDEX ' . $name . '_idx ON [{' . $table . '}] (' . $this->createKeySql($fields) . ')';
+    return 'CREATE CLUSTERED INDEX ' . $name . '_idx ON [{' . $table . '}] (' . $this->createKeySql($fields) . ')';
   }
 
   /**