diff --git a/patchutils.spec b/patchutils.spec
index 1904092..3fa6305 100644
--- a/patchutils.spec
+++ b/patchutils.spec
@@ -1,7 +1,7 @@
 Summary: A collection of programs for manipulating patch files
 Name: patchutils
 Version: 0.3.4
-Release: 11%{?dist}
+Release: 12%{?dist}
 License: GPLv2+
 Group: Applications/System
 URL: http://cyberelk.net/tim/patchutils/
@@ -10,6 +10,7 @@ Patch1: patchutils-bz1226985.patch
 Patch2: patchutils-format-str.patch
 Obsoletes: interdiff <= 0.0.10
 Provides: interdiff = 0.0.11
+Requires: patch
 BuildRequires:  gcc
 BuildRequires: perl-generators
 BuildRequires: xmlto
@@ -51,6 +52,9 @@ make DESTDIR=%{buildroot} install
 %{_mandir}/*/*
 
 %changelog
+* Tue Jul 31 2018 Tim Waugh <twaugh@redhat.com> - 0.3.4-12
+- Requires patch (bug #1609946).
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.4-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild