diff --git a/numactl.spec b/numactl.spec
index 6124eb0..f6b1dc7 100644
--- a/numactl.spec
+++ b/numactl.spec
@@ -35,7 +35,7 @@ allocations with NUMA policy in applications.
 
 %build
 cd numactl-%{version}
-make CFLAGS="$RPM_OPT_FLAGS -I. -fPIC"
+make CFLAGS="$RPM_OPT_FLAGS -I. -fPIC -D_FORTITY_SOURCE=2"
 
 %install
 rm -rf $RPM_BUILD_ROOT
@@ -68,6 +68,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}
 
 %changelog
+* Tue Feb  8 2004 Dave Jones <davej@redhat.com>
+- rebuild with -D_FORTITY_SOURCE=2
+
 * Wed Nov 10 2004 David Woodhouse <dwmw2@redhat.com>
 - Fix build on x86_64