diff --git a/perl-5.18.1-Document-Math-BigInt-CalcEmu-requires-Math-BigInt.patch b/perl-5.18.1-Document-Math-BigInt-CalcEmu-requires-Math-BigInt.patch
new file mode 100644
index 0000000..c3db43d
--- /dev/null
+++ b/perl-5.18.1-Document-Math-BigInt-CalcEmu-requires-Math-BigInt.patch
@@ -0,0 +1,30 @@
+From 862c89c81d26dae0dcef138e19df8b45615e69c9 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
+Date: Mon, 2 Dec 2013 10:10:56 +0100
+Subject: [PATCH] Document Math::BigInt::CalcEmu requires Math::BigInt
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+<https://rt.cpan.org/Public/Bug/Display.html?id=85015>
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ dist/Math-BigInt/lib/Math/BigInt/CalcEmu.pm | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/dist/Math-BigInt/lib/Math/BigInt/CalcEmu.pm b/dist/Math-BigInt/lib/Math/BigInt/CalcEmu.pm
+index c82e153..0c0b496 100644
+--- a/dist/Math-BigInt/lib/Math/BigInt/CalcEmu.pm
++++ b/dist/Math-BigInt/lib/Math/BigInt/CalcEmu.pm
+@@ -290,6 +290,7 @@ Math::BigInt::CalcEmu - Emulate low-level math with BigInt code
+ 
+ =head1 SYNOPSIS
+ 
++	use Math::BigInt;
+ 	use Math::BigInt::CalcEmu;
+ 
+ =head1 DESCRIPTION
+-- 
+1.8.3.1
+
diff --git a/perl.spec b/perl.spec
index 3a664f1..39b21b8 100644
--- a/perl.spec
+++ b/perl.spec
@@ -30,7 +30,7 @@
 Name:           perl
 Version:        %{perl_version}
 # release number must be even higher, because dual-lived modules will be broken otherwise
-Release:        289%{?dist}
+Release:        290%{?dist}
 Epoch:          %{perl_epoch}
 Summary:        Practical Extraction and Report Language
 Group:          Development/Languages
@@ -117,6 +117,10 @@ Patch20:        perl-5.19.3-Reap-child-in-case-where-exception-has-been-thrown.p
 # Update the upstream patch to work for Perl 5.18.1
 Patch21:        perl-5.19.2-Fix-using-regexes-with-multiple-code-blocks.patch
 
+# Document Math::BigInt::CalcEmu requires Math::BigInt, rhbz#959096,
+# CPAN RT#85015
+Patch22:        perl-5.18.1-Document-Math-BigInt-CalcEmu-requires-Math-BigInt.patch 
+
 # Link XS modules to libperl.so with EU::CBuilder on Linux, bug #960048
 Patch200:       perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-CBuilder-on-Li.patch
 
@@ -1913,6 +1917,7 @@ tarball from perl.org.
 %patch19 -p1
 %patch20 -p1
 %patch21 -p1
+%patch22 -p1
 %patch200 -p1
 %patch201 -p1
 
@@ -1939,6 +1944,7 @@ perl -x patchlevel.h \
     'Fedora Patch19: Fix coreamp.t rand test (RT#118237)' \
     'Fedora Patch20: Reap child in case where exception has been thrown (RT#114722)' \
     'Fedora Patch21: Fix using regular expressions containing multiple code blocks (RT#117917)' \
+    'Fedora Patch22: Document Math::BigInt::CalcEmu requires Math::BigInt (CPAN RT#85015)' \
     'Fedora Patch200: Link XS modules to libperl.so with EU::CBuilder on Linux' \
     'Fedora Patch201: Link XS modules to libperl.so with EU::MM on Linux' \
     %{nil}
@@ -3625,6 +3631,9 @@ sed \
 
 # Old changelog entries are preserved in CVS.
 %changelog
+* Mon Dec 02 2013 Petr Pisar <ppisar@redhat.com> - 4:5.18.1-290
+- Document Math::BigInt::CalcEmu requires Math::BigInt (bug #959096)
+
 * Tue Oct 22 2013 Petr Pisar <ppisar@redhat.com> - 4:5.18.1-289
 - perl_default_filter macro does not need to filter private libraries from
   provides (bug #1020809)