diff --git a/socat.spec b/socat.spec
index 31f86e5..61acaa9 100644
--- a/socat.spec
+++ b/socat.spec
@@ -1,7 +1,7 @@
 Summary: Bidirectional data relay between two data channels ('netcat++')
 Name: socat
 Version: 1.7.1.1
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: GPLv2
 Url:  http://www.dest-unreach.org/%{name}
 Source: http://www.dest-unreach.org/socat/download/%{name}-%{version}.tar.bz2
@@ -9,6 +9,7 @@ Patch0: socat-wall.patch
 Group: Applications/Internet
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: openssl-devel readline-devel ncurses-devel kernel-headers > 2.6.18
+BuildRequires: autoconf
 
 %description
 Socat is a relay for bidirectional data transfer between two independent data
@@ -25,6 +26,7 @@ mv CHANGES.utf8 CHANGES
 %patch0
 
 %build
+autoconf
 %configure  \
         --enable-help --enable-stdio \
         --enable-fdnum --enable-file --enable-creat \
@@ -60,6 +62,10 @@ rm -rf %{buildroot}
 %doc %{_mandir}/man1/socat.1*
 
 %changelog
+* Sat Aug 29 2009 Caolán McNamara <caolanm@redhat.com> - 1.7.1.1-5
+- recreate autoconf to get correct includes when determining type
+  sizes in order to build correctly
+
 * Fri Aug 28 2009 Paul Wouters <paul@xelerance.com> - 1.7.1.1-4
 - Bump for new openssl