diff --git a/tk.spec b/tk.spec
index f61426c..eff76e8 100644
--- a/tk.spec
+++ b/tk.spec
@@ -13,7 +13,7 @@ Source0: http://download.sourceforge.net/tcl/%{name}%{version}-src.tar.gz
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 Requires: tcl = %{version}
 Requires(post,postun): /sbin/ldconfig
-BuildRequires: tcl-devel = %{version}, autoconf
+BuildRequires: tcl-devel = %{epoch}:%{version}, autoconf
 BuildRequires: libX11-devel, sed
 # panedwindow.n from itcl conflicts
 Obsoletes: itcl <= 3.2