diff --git a/perl-XML-Feed.spec b/perl-XML-Feed.spec
index c7d0084..ad223d4 100644
--- a/perl-XML-Feed.spec
+++ b/perl-XML-Feed.spec
@@ -8,6 +8,7 @@ URL:            http://search.cpan.org/dist/XML-Feed/
 Source0:        http://www.cpan.org/authors/id/S/SI/SIMONW/XML-Feed-%{version}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildArch:      noarch
+BuildRequires:  perl(Class::ISA)
 BuildRequires:  perl(Class::ErrorHandler)
 BuildRequires:  perl(DateTime)
 BuildRequires:  perl(DateTime::Format::Mail)