diff --git a/perl-IO-Multiplex.spec b/perl-IO-Multiplex.spec
index 252e7c7..a6c7c6d 100644
--- a/perl-IO-Multiplex.spec
+++ b/perl-IO-Multiplex.spec
@@ -1,14 +1,21 @@
 Summary:	Manage IO on many file handles
 Name:		perl-IO-Multiplex
 Version:	1.13
-Release:	2%{?dist}
+Release:	3%{?dist}
 License:	GPL+ or Artistic
 Group:		Development/Libraries
 URL:		http://search.cpan.org/dist/IO-Multiplex/
 Source0:	http://search.cpan.org/CPAN/authors/id/M/MA/MARKOV/IO-Multiplex-%{version}.tar.gz
 BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(id -nu)
 BuildArch:	noarch
+BuildRequires:	perl(Carp)
+BuildRequires:	perl(Fcntl)
 BuildRequires:	perl(ExtUtils::MakeMaker)
+BuildRequires:	perl(FileHandle)
+BuildRequires:	perl(IO::Handle)
+BuildRequires:	perl(POSIX)
+BuildRequires:	perl(Socket)
+BuildRequires:	perl(Tie::Handle)
 Requires:	perl(:MODULE_COMPAT_%(eval "`perl -V:version`"; echo $version))
 
 %description
@@ -45,6 +52,9 @@ rm -rf %{buildroot}
 %{_mandir}/man3/IO::Multiplex.3pm*
 
 %changelog
+* Thu Jan 12 2012 Paul Howarth <paul@city-fan.org> - 1.13-2
+- Add buildreqs for core modules, which may be dual-lived
+
 * Fri Jun 17 2011 Marcela Mašláňová <mmaslano@redhat.com> - 1.13-2
 - Perl mass rebuild