doc: put correct pkg for Centos6

diff --git a/doc/developer/Building_FRR_on_CentOS6.rst b/doc/developer/Building_FRR_on_CentOS6.rst
index 7ca14331f03b400185222d924245947e3d90422d..c138eb11a3042fa487db593d741c7735c0d4c016 100644 (file)
--- a/doc/developer/Building_FRR_on_CentOS6.rst
+++ b/doc/developer/Building_FRR_on_CentOS6.rst
@@ -31,7 +31,7 @@ Add packages:
     sudo yum install git autoconf automake libtool make gawk \
       readline-devel texinfo net-snmp-devel groff pkgconfig \
       json-c-devel pam-devel flex epel-release perl-XML-LibXML \
-      c-ares-devel python-sphinx
+      c-ares-devel python-sphinx10
 
 Install newer version of bison (CentOS 6 package source is too old) from
 CentOS 7