diff --git a/0001-git-svn-avoid-warning-on-undef-readline.patch b/0001-git-svn-avoid-warning-on-undef-readline.patch
new file mode 100644
index 0000000..a274887
--- /dev/null
+++ b/0001-git-svn-avoid-warning-on-undef-readline.patch
@@ -0,0 +1,49 @@
+From 51db2715876580acdb28b17079c9f6cb784da849 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?=
+ <avarab@gmail.com>
+Date: Fri, 6 Apr 2018 13:15:14 +0000
+Subject: [PATCH] git-svn: avoid warning on undef readline()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Change code in Git.pm that sometimes calls chomp() on undef to only do
+so the value is defined.
+
+This code has been chomping undef values ever since it was added in
+b26098fc2f ("git-svn: reduce scope of input record separator change",
+2016-10-14), but started warning due to the introduction of "use
+warnings" to Git.pm in my f0e19cb7ce ("Git.pm: add the "use warnings"
+pragma", 2018-02-25) released with 2.17.0.
+
+Since this function will return undef in those cases it's still
+possible that the code using it will warn if it does a chomp of its
+own, as the code added in b26098fc2f ("git-svn: reduce scope of input
+record separator change", 2016-10-14) might do, but since git-svn has
+"use warnings" already that's clearly not a codepath that's going to
+warn.
+
+See https://public-inbox.org/git/86h8oobl36.fsf@phe.ftfl.ca/ for the
+original report.
+
+Reported-by: Joseph Mingrone <jrm@ftfl.ca>
+Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
+Improved-by: Eric Wong <e@80x24.org>
+Signed-off-by: Junio C Hamano <gitster@pobox.com>
+---
+ perl/Git.pm | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/perl/Git.pm b/perl/Git.pm
+index d2c5a8d238b87..d453e4b83b827 100644
+--- a/perl/Git.pm
++++ b/perl/Git.pm
+@@ -549,7 +549,7 @@ sub get_record {
+ 	my ($fh, $rs) = @_;
+ 	local $/ = $rs;
+ 	my $rec = <$fh>;
+-	chomp $rec if defined $rs;
++	chomp $rec if defined $rec;
+ 	$rec;
+ }
+ 
diff --git a/git.spec b/git.spec
index 38786bc..1902e10 100644
--- a/git.spec
+++ b/git.spec
@@ -116,6 +116,8 @@ Source99:       print-failed-test-output
 Patch0:         git-1.8-gitweb-home-link.patch
 # https://bugzilla.redhat.com/490602
 Patch1:         git-cvsimport-Ignore-cvsps-2.2b1-Branches-output.patch
+# https://github.com/gitster/git/commit/51db271.patch
+Patch2:         0001-git-svn-avoid-warning-on-undef-readline.patch
 
 %if %{with docs}
 BuildRequires:  asciidoc >= 8.4.1
@@ -889,6 +891,9 @@ make test || ./print-failed-test-output
 %{?with_docs:%{_pkgdocdir}/git-svn.html}
 
 %changelog
+* Mon Apr 09 2018 Todd Zullinger <tmz@pobox.com>
+- git-svn: avoid uninitialized value warning
+
 * Sun Apr 08 2018 Todd Zullinger <tmz@pobox.com>
 - Clean up redundant and unneeded Requires