diff --git a/docs/index.rst b/docs/index.rst
index d2fd8c5..60b207a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -631,7 +631,7 @@ editor.
 
 .. warning::
 
-   Change all occurrences of ``"index=email"` in the XML to
+   Change all occurrences of ``"index=email"`` in the XML to
    match your own index name
 
 Running parsedmarc as a systemd service