diff --git a/docs/source/advanced/kit/hpc/software/essl.rst b/docs/source/advanced/kit/hpc/software/essl.rst
index a3cacc15c..a39c4b91e 100644
--- a/docs/source/advanced/kit/hpc/software/essl.rst
+++ b/docs/source/advanced/kit/hpc/software/essl.rst
@@ -19,7 +19,7 @@ Dependencies
         essl-computenode-3264rte-5.4.0-0-rhels-7.2-ppc64le
 
 Reference
---------------
+---------
   Refer to ESSL installation guide for more information: http://www.ibm.com/support/knowledgecenter/SSFHY8_5.4.0/com.ibm.cluster.essl.v5r4.essl300.doc/am5il_xcatinstall.htm