diff --git a/doc/image-guide/source/introduction.rst b/doc/image-guide/source/introduction.rst
index d31739189b..7881391f16 100644
--- a/doc/image-guide/source/introduction.rst
+++ b/doc/image-guide/source/introduction.rst
@@ -54,7 +54,7 @@ OVF
  `OVF <http://dmtf.org/sites/default/files/OVF_Overview_Document_2010.pdf>`_
  (Open Virtualization Format) is a packaging format for virtual machines,
  defined by the Distributed Management Task Force (DMTF) standards group.
- An OVF package contains one or more image files, a .ovf XML metadata file
+ An OVF package contains one or more image files, a ``.ovf`` XML metadata file
  that contains information about the virtual machine, and possibly other
  files as well.