diff --git a/gfan.spec b/gfan.spec
index e7f21e3..6139794 100644
--- a/gfan.spec
+++ b/gfan.spec
@@ -1,6 +1,6 @@
 Name:           gfan
 Version:        0.3
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Software for Computing Gröbner Fans and Tropical Varieties
 Group:          Applications/Engineering
 License:        GPL+
@@ -42,7 +42,7 @@ sed -i -e 's|^OPTFLAGS.*$||' \
 
 
 %build
-export OPTFLAGS="%{optflags} -DGMPRATIONAL"
+export OPTFLAGS="%{optflags} -DGMPRATIONAL -I/usr/include/cddlib"
 make %{?_smp_mflags}
 
 
@@ -72,6 +72,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Thu Feb 26 2009 Conrad Meyer <konrad@tylerc.org> - 0.3-5
+- Include the right place for headers (fix FTBFS).
+
 * Tue Feb 24 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.3-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild