diff --git a/pkgs/development/perl-modules/Unicode-String-perl-5-22.patch b/pkgs/development/perl-modules/Unicode-String-perl-5-22.patch
deleted file mode 100644
index 08d0d13b41f..00000000000
--- a/pkgs/development/perl-modules/Unicode-String-perl-5-22.patch
+++ /dev/null
@@ -1,11 +0,0 @@
-diff -ru libunicode-string-perl-2.09.pristine/lib/Unicode/CharName.pm libunicode-string-perl-2.09/lib/Unicode/CharName.pm
---- libunicode-string-perl-2.09.pristine/lib/Unicode/CharName.pm	2005-10-25 19:11:00.000000000 +0100
-+++ libunicode-string-perl-2.09/lib/Unicode/CharName.pm	2012-01-24 12:56:59.730653088 +0000
-@@ -77,7 +77,7 @@
- 	    return join("", "HANGUL SYLLABLE ", @s)
- 	}
-     }
--    _init_names() unless defined %NAMES;
-+    _init_names() unless %NAMES;
-     $NAMES{sprintf("%04X",$code)}
- }
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index cd83258b179..658968f62ae 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -17240,13 +17240,10 @@ let self = _self // overrides; _self = with self; {
   };
 
   UnicodeString = buildPerlPackage rec {
-    name = "Unicode-String-2.09";
-    patches = [
-      ../development/perl-modules/Unicode-String-perl-5-22.patch
-    ];
+    name = "Unicode-String-2.10";
     src = fetchurl {
-      url = "mirror://cpan/authors/id/G/GA/GAAS/${name}.tar.gz";
-      sha256 = "1bgsaf3dgmlgyvi84r42ysc037mr5280amnypa4d98jfjpdvw5y8";
+      url = mirror://cpan/authors/id/G/GA/GAAS/GAAS/Unicode-String-2.10.tar.gz;
+      sha256 = "0s4vp8k7ag7z9lsnnkpa9mnch83kxhp9gh7yiapld5a7rq712jl9";
     };
   };