diff --git a/patchutils.spec b/patchutils.spec
index 2e25430..1e94793 100644
--- a/patchutils.spec
+++ b/patchutils.spec
@@ -7,6 +7,7 @@ Group: Applications/System
 URL: http://cyberelk.net/tim/patchutils/
 Source0: http://cyberelk.net/tim/data/patchutils/stable/%{name}-%{version}.tar.xz
 Patch1: patchutils-bz1226985.patch
+Patch2: patchutils-format-str.patch
 Obsoletes: interdiff <= 0.0.10
 Provides: interdiff = 0.0.11
 BuildRequires: perl-generators
@@ -25,6 +26,9 @@ patches, and simply listing the files modified by a patch.
 # Fixed handling of delete-file diffs from git (bug #1226985).
 %patch1 -p1 -b .bz1226985
 
+# Don't use regerror() result as format string.
+%patch2 -p1 -b .format-str
+
 autoreconf
 
 %build