diff --git a/iptables.spec b/iptables.spec
index 0a125da..60687d8 100644
--- a/iptables.spec
+++ b/iptables.spec
@@ -64,23 +64,27 @@ find . -type f -exec perl -pi -e "s,/usr/local,%{_prefix},g" {} \;
 
 # do not use ld -shared and _init
 perl -pi -e "s/\(LD\) -shared/\(CC\) -shared/g" Rules.make
-perl -pi -e "s/void _init\(/void __attribute\(\(constructor\)\) my_init\(/g" extensions/*.c
-perl -pi -e "s/^_init\(/__attribute\(\(constructor\)\) my_init\(/g" extensions/*.c
+perl -pi -e "s/void _init\(/void __attribute\(\(constructor\)\) nf_ext_init\(/g" extensions/*.c
+perl -pi -e "s/^_init\(/__attribute\(\(constructor\)\) nf_ext_init\(/g" extensions/*.c
 
 %build
 TOPDIR=`pwd`
 OPT="$RPM_OPT_FLAGS -I$TOPDIR/include -fPIC"
+export KERNEL_DIR=/usr
+export KBUILD_OUTPUT=/usr
 export DO_SELINUX=1
-make COPT_FLAGS="$OPT" KERNEL_DIR=/usr LIBDIR=/%{_lib} 
-make COPT_FLAGS="$OPT" KERNEL_DIR=/usr LIBDIR=/%{_lib} iptables-save iptables-restore
-make COPT_FLAGS="$OPT" KERNEL_DIR=/usr LIBDIR=/%{_lib} ip6tables-save ip6tables-restore
+make COPT_FLAGS="$OPT" LIBDIR=/%{_lib} 
+make COPT_FLAGS="$OPT" LIBDIR=/%{_lib} iptables-save iptables-restore
+make COPT_FLAGS="$OPT" LIBDIR=/%{_lib} ip6tables-save ip6tables-restore
 
 %install
 rm -rf %{buildroot}
+export KERNEL_DIR=/usr
+export KBUILD_OUTPUT=/usr
 export DO_SELINUX=1
-make install DESTDIR=%{buildroot} KERNEL_DIR=/usr BINDIR=/sbin LIBDIR=/%{_lib} MANDIR=%{_mandir}
+make install DESTDIR=%{buildroot} BINDIR=/sbin LIBDIR=/%{_lib} MANDIR=%{_mandir}
 %if %{build_devel}
-make install-devel DESTDIR=%{buildroot} KERNEL_DIR=/usr BINDIR=/sbin LIBDIR=%{_libdir} MANDIR=%{_mandir}
+make install-devel DESTDIR=%{buildroot} BINDIR=/sbin LIBDIR=%{_libdir} MANDIR=%{_mandir}
 %endif
 cp ip{6,}tables-{save,restore} $RPM_BUILD_ROOT/sbin
 cp iptables-*.8 $RPM_BUILD_ROOT%{_mandir}/man8
@@ -154,6 +158,7 @@ fi
 - new version 1.4.0
 - fixed condrestart (rhbz#428148)
 - report the module in rmmod_r if there is an error
+- use nf_ext_init instead of my_init for extension constructors
 
 * Mon Nov  5 2007 Thomas Woerner <twoerner@redhat.com> 1.3.8-6
 - fixed leaked file descriptor before fork/exec (rhbz#312191)