diff --git a/docs/source/index.rst b/docs/source/index.rst
index f146294..5c043d2 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -12,7 +12,7 @@ It harnesses the power of `MDAnalysis <https://www.mdanalysis.org/>`_'s
 core `AtomGroup` and `Universe` data structures to quickly access
 trajectory data and execute complex transport property calculations.
 Unless otherwise stated, all calculations and results are in `MDAnalysis
-standard units <https://userguide.mdanalysis.org/stable/units>`.
+standard units <https://userguide.mdanalysis.org/stable/units>`_.
 
 To begin, check out the Getting Started section of the documentation.