diff --git a/ldns-swig4.0.patch b/ldns-swig4.0.patch
new file mode 100644
index 0000000..4ecff0d
--- /dev/null
+++ b/ldns-swig4.0.patch
@@ -0,0 +1,12 @@
+diff -up ldns-1.7.0/contrib/python/ldns_key.i.swig4 ldns-1.7.0/contrib/python/ldns_key.i
+--- ldns-1.7.0/contrib/python/ldns_key.i.swig4	2016-12-20 11:48:22.000000000 +0100
++++ ldns-1.7.0/contrib/python/ldns_key.i	2019-03-15 12:21:22.608314831 +0100
+@@ -41,7 +41,7 @@
+   $result = SWIG_Python_AppendOutput($result, SWIG_NewPointerObj(SWIG_as_voidptr($1_key), SWIGTYPE_p_ldns_struct_key, SWIG_POINTER_OWN |  0 ));
+ }
+ 
+-%exception ldns_key_set_pubkey_owner(ldns_key *k, ldns_rdf *r)  %{ $action Py_INCREF(obj1); %}
++%typemap(argout) ldns_rdf *r "Py_INCREF($input);"
+ 
+ %nodefaultctor ldns_struct_key; //no default constructor & destructor
+ %nodefaultdtor ldns_struct_key;
diff --git a/ldns.changes b/ldns.changes
index 652343d..ea8cc97 100644
--- a/ldns.changes
+++ b/ldns.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Jun  7 14:18:17 UTC 2019 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Add ldns-swig4.0.patch: Fix build wih SWIG 4.0 (boo#1135750).
+
 -------------------------------------------------------------------
 Mon Jan  8 10:08:13 UTC 2018 - tchvatal@suse.com
 
diff --git a/ldns.spec b/ldns.spec
index 2877b6f..752d59c 100644
--- a/ldns.spec
+++ b/ldns.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package ldns
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -12,7 +12,7 @@
 # license that conforms to the Open Source Definition (Version 1.9)
 # published by the Open Source Initiative.
 
-# Please submit bugfixes or comments via http://bugs.opensuse.org/
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
 
@@ -23,8 +23,10 @@ Release:        0
 Summary:        A library for developing the Domain Name System
 License:        BSD-3-Clause
 Group:          Development/Libraries/C and C++
-Url:            http://www.nlnetlabs.nl/projects/ldns/
+URL:            http://www.nlnetlabs.nl/projects/ldns/
 Source:         http://www.nlnetlabs.nl/downloads/ldns/ldns-%{version}.tar.gz
+# https://github.com/NLnetLabs/ldns/issues/7
+Patch0:         ldns-swig4.0.patch
 BuildRequires:  doxygen
 BuildRequires:  fdupes
 BuildRequires:  libopenssl-devel
@@ -83,6 +85,7 @@ Perl bindings for the ldns library.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 export CFLAGS="%{optflags} -fno-strict-aliasing"
@@ -161,8 +164,8 @@ rm -v %{buildroot}%{_libdir}/libldns.*a
 %{_bindir}/ldns-zsplit
 %{_bindir}/ldnsd
 %{_bindir}/ldns-dane
-%{_mandir}/man1/drill.1*
-%{_mandir}/man1/ldns*.1*
+%{_mandir}/man1/drill.1%{?ext_man}
+%{_mandir}/man1/ldns*.1%{?ext_man}
 
 %files -n %{libname}
 %{_libdir}/libldns.so.*
@@ -171,8 +174,9 @@ rm -v %{buildroot}%{_libdir}/libldns.*a
 %{_bindir}/ldns-config
 %{_includedir}/ldns/
 %{_libdir}/libldns.so
-%{_mandir}/man3/ldns*.3*
-%doc libdns.vim LICENSE README*
+%{_mandir}/man3/ldns*.3%{?ext_man}
+%license LICENSE
+%doc libdns.vim README*
 
 %files -n perl-DNS-LDNS
 %{perl_vendorarch}/DNS/LDNS.pm