diff --git a/unixODBC.spec b/unixODBC.spec
index 0413be0..66dc109 100644
--- a/unixODBC.spec
+++ b/unixODBC.spec
@@ -1,7 +1,7 @@
 Summary: A complete ODBC driver manager for Linux
 Name: unixODBC
 Version: 2.2.12
-Release: 4%{?dist}
+Release: 5%{?dist}
 Group: System Environment/Libraries
 URL: http://www.unixODBC.org/
 # Programs are GPL, libraries are LGPL, except News Server library is GPL.
@@ -20,7 +20,7 @@ Patch6: unixODBC-2.2.11-stricmp.patch
 Conflicts: iodbc
 BuildRequires: libX11-devel libXt-devel libXext-devel
 BuildRequires: qt-devel readline-devel
-BuildRequires: automake autoconf libtool bison
+BuildRequires: automake autoconf libtool bison flex
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 
 %description
@@ -175,6 +175,10 @@ rm -rf $RPM_BUILD_ROOT
 %postun -p /sbin/ldconfig
 
 %changelog
+* Sun Dec 30 2007 Tom Lane <tgl@redhat.com> 2.2.12-5
+- Add missing BuildRequires for flex.
+Resolves: #427063
+
 * Thu Aug  2 2007 Tom Lane <tgl@redhat.com> 2.2.12-4
 - Update License tag to match code.