diff --git a/source/reference/explain-results.txt b/source/reference/explain-results.txt
index 6b3bc7c44bc..05460123a05 100644
--- a/source/reference/explain-results.txt
+++ b/source/reference/explain-results.txt
@@ -309,7 +309,7 @@ information:
 
          .. code-block:: javascript
 
-            db.keys.find( { x : $in : [ 3, 4, 50, 74, 75, 90 ] } ).explain( "executionStats" )
+            db.keys.find( { x : { $in : [ 3, 4, 50, 74, 75, 90 ] } } ).explain( "executionStats" )
    
          The query will scan keys ``3`` and ``4``. It will then scan the key 
          ``5``, detect that it is out-of-bounds, and skip to the next key