diff --git a/sle-kernels.patch b/sle-kernels.patch
new file mode 100644
index 0000000..0daf530
--- /dev/null
+++ b/sle-kernels.patch
@@ -0,0 +1,32 @@
+From: Jan Engelhardt <jengelh@inai.de>
+Date: 2021-03-19 10:38:28.244573625 +0100
+References: https://bugzilla.suse.com/show_bug.cgi?id=1183753
+
+Workaround the SLE kernels misrepresenting themselves.
+
+---
+ extensions/xt_TARPIT.c |    4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+Index: xtables-addons-3.18/extensions/xt_TARPIT.c
+===================================================================
+--- xtables-addons-3.18.orig/extensions/xt_TARPIT.c
++++ xtables-addons-3.18/extensions/xt_TARPIT.c
+@@ -206,7 +206,7 @@ static void tarpit_tcp4(const struct xt_
+ 		return;
+ 
+ 	/* This packet will not be the same as the other: clear nf fields */
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0) || defined(SLE_15_3)
+ 	nf_reset_ct(nskb);
+ #else
+ 	nf_reset(nskb);
+@@ -352,7 +352,7 @@ static void tarpit_tcp6(const struct xt_
+ 	}
+ 
+ 	/* This packet will not be the same as the other: clear nf fields */
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0) || defined(SLE_15_3)
+ 	nf_reset_ct(nskb);
+ #else
+ 	nf_reset(nskb);
diff --git a/xtables-addons.changes b/xtables-addons.changes
index 0684502..92767e0 100644
--- a/xtables-addons.changes
+++ b/xtables-addons.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Mar 19 09:37:36 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
+
+- Add sle-kernels.patch [boo#1183753]
+
 -------------------------------------------------------------------
 Thu Mar 11 16:14:44 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/xtables-addons.spec b/xtables-addons.spec
index 1476813..020d04c 100644
--- a/xtables-addons.spec
+++ b/xtables-addons.spec
@@ -29,8 +29,11 @@ Source:         https://inai.de/files/%name/%name-%version.tar.xz
 Source2:        https://inai.de/files/%name/%name-%version.tar.asc
 Source3:        %name-preamble
 Source4:        %name.keyring
+Patch1:         sle-kernels.patch
 BuildRequires:  %kernel_module_package_buildreqs
+BuildRequires:  automake
 BuildRequires:  kernel-syms >= 4.15
+BuildRequires:  libtool
 BuildRequires:  pkg-config >= 0.21
 BuildRequires:  xz
 BuildRequires:  pkgconfig(xtables) >= 1.6.0
@@ -69,8 +72,13 @@ main kernel/iptables packages.
 
 %prep
 %autosetup -p1
+autoreconf -fiv
 
 %build
+%if 0%{?sle_version} == 150300
+export KCFLAGS="-DSLE_15_3"
+echo "$KCFLAGS" >kcflags
+%endif
 pushd ../
 for flavor in %flavors_to_build; do
 	cp -a "%name-%version" "%name-$flavor-%version"
@@ -82,10 +90,12 @@ done
 
 %install
 b="%buildroot"
+# kernel's make install is picky about flags changing between %%build and %%install
+export KCFLAGS="$(cat kcflags)"
 pushd ../
 for flavor in %flavors_to_build; do
 	pushd "%name-$flavor-%version/"
-	make %{?linux_make_arch} install DESTDIR="$b"
+	make %{?linux_make_arch} install DESTDIR="$b" V=1
 	popd
 done
 # There is no -devel package. So no need for these files.