diff --git a/polymake.spec b/polymake.spec
index 1de7926..80aad43 100644
--- a/polymake.spec
+++ b/polymake.spec
@@ -9,7 +9,7 @@
 
 Name:           polymake
 Version:        2.12
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Algorithms on convex polytopes and polyhedra
 
 License:        GPLv2+
@@ -45,6 +45,8 @@ BuildRequires:  sympol-devel
 BuildRequires:  xhtml1-dtds
 
 Requires:       perl(:MODULE_COMPAT_%{perl_version})
+Requires:       perl = 4:%{perl_version}
+Requires:       perl(Term::ReadLine::Gnu)
 
 %global sover   %(echo %{version} | cut -d. -f1-2)
 %global major   %(echo %{version} | cut -d. -f1)
@@ -204,6 +206,10 @@ find %{buildroot}%{polydir} -name \*.so | xargs chmod 0755
 %doc doc/*
 
 %changelog
+* Wed May 15 2013 Jerry James <loganjerry@gmail.com> - 2.12-6
+- Require version of perl used to build (bz 963486)
+- perl(Term::ReadLine::Gnu) dependency is not autogenerated (bz 963486)
+
 * Wed Mar 20 2013 Jerry James <loganjerry@gmail.com> - 2.12-5
 - Add -lrslib patch to fix a segfault (bz 923269)