diff --git a/SPECS/Net-CalDAVTalk-0.12-Load-Data-Dumper.patch b/SPECS/Net-CalDAVTalk-0.12-Load-Data-Dumper.patch
new file mode 100644
index 0000000..8219da5
--- /dev/null
+++ b/SPECS/Net-CalDAVTalk-0.12-Load-Data-Dumper.patch
@@ -0,0 +1,41 @@
+From 64be033d4ab3e2558bbb36dca582db5efa6bf203 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
+Date: Thu, 16 Nov 2017 15:38:18 +0100
+Subject: [PATCH] Load Data::Dumper
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ Makefile.PL           | 1 +
+ lib/Net/CalDAVTalk.pm | 1 +
+ 2 files changed, 2 insertions(+)
+
+diff --git a/Makefile.PL b/Makefile.PL
+index 911e287..86d11e1 100644
+--- a/Makefile.PL
++++ b/Makefile.PL
+@@ -19,6 +19,7 @@ WriteMakefile(
+     },
+     PREREQ_PM => {
+         'Net::DAVTalk' => '0.02',
++        'Data::Dumper' => '0',
+         'DateTime::TimeZone' => 0,
+         'Data::ICal::TimeZone' => '1.23',
+         'DateTime::Format::ISO8601' => '0.08',
+diff --git a/lib/Net/CalDAVTalk.pm b/lib/Net/CalDAVTalk.pm
+index 2b42202..05804b0 100644
+--- a/lib/Net/CalDAVTalk.pm
++++ b/lib/Net/CalDAVTalk.pm
+@@ -1659,6 +1659,7 @@ sub _getDateObjMulti {
+ sub _hexkey {
+   my $VEvent = shift;
+   my $updated = delete $VEvent->{properties}->{updated};
++  require Data::Dumper;
+   my $d = Data::Dumper->new([$VEvent]);
+   $d->Indent(0);
+   $d->Sortkeys(1);
+-- 
+2.13.6
+
diff --git a/SPECS/Net-CalDAVTalk-0.12.tar.gz b/SPECS/Net-CalDAVTalk-0.12.tar.gz
new file mode 100644
index 0000000..49bd8e2
Binary files /dev/null and b/SPECS/Net-CalDAVTalk-0.12.tar.gz differ