diff --git a/README.textile b/README.textile
index f02a18d214b0b..91895df93b4f8 100644
--- a/README.textile
+++ b/README.textile
@@ -106,7 +106,7 @@ curl -XGET 'http://localhost:9200/twitter/_search?pretty=true' -H 'Content-Type:
 }'
 </pre>
 
-We can also do range search (the @postDate@ was automatically identified as date)
+We can also do range search (the @post_date@ was automatically identified as date)
 
 <pre>
 curl -XGET 'http://localhost:9200/twitter/_search?pretty=true' -H 'Content-Type: application/json' -d '