diff --git a/README.rst b/README.rst
index 2e6b30d..90730cd 100644
--- a/README.rst
+++ b/README.rst
@@ -109,7 +109,7 @@
           es-json:
             engine: es-json
             message_matcher: TRUE
-            index = logfile-%{%Y.%m.%d}
+            index: logfile-%{%Y.%m.%d}
 
 Read more
 =========