diff --git a/doc/source/user_guide/io.rst b/doc/source/user_guide/io.rst
index cfacc0280e97f..ecd547c5ff4d6 100644
--- a/doc/source/user_guide/io.rst
+++ b/doc/source/user_guide/io.rst
@@ -1811,8 +1811,8 @@ Writing JSON
 A ``Series`` or ``DataFrame`` can be converted to a valid JSON string. Use ``to_json``
 with optional parameters:
 
-* ``path_or_buf`` : the pathname or buffer to write the output
-  This can be ``None`` in which case a JSON string is returned
+* ``path_or_buf`` : the pathname or buffer to write the output.
+  This can be ``None`` in which case a JSON string is returned.
 * ``orient`` :
 
   ``Series``: