diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index 2453484cb9c4..9bea14bd8e85 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -2,17 +2,14 @@
 
 stdenv.mkDerivation rec {
   name = "libunwind-${version}";
-  version = "1.2.1";
+  version = "1.3.1";
 
   src = fetchurl {
     url = "mirror://savannah/libunwind/${name}.tar.gz";
-    sha256 = "1jsslwkilwrsj959dc8b479qildawz67r8m4lzxm7glcwa8cngiz";
+    sha256 = "1y0l08k6ak1mqbfj6accf9s5686kljwgsl4vcqpxzk5n74wpm6a3";
   };
 
-  patches = [
-    ./version-1.2.1.patch
-    ./backtrace-only-with-glibc.patch
-  ];
+  patches = [ ./backtrace-only-with-glibc.patch ];
 
   nativeBuildInputs = [ autoreconfHook ];
 
diff --git a/pkgs/development/libraries/libunwind/version-1.2.1.patch b/pkgs/development/libraries/libunwind/version-1.2.1.patch
deleted file mode 100644
index 63202937084c..000000000000
--- a/pkgs/development/libraries/libunwind/version-1.2.1.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/configure.ac b/configure.ac
-index a254bbe..fe0247b 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -1,6 +1,6 @@
- define(pkg_major, 1)
--define(pkg_minor, 2.1)
--define(pkg_extra, )
-+define(pkg_minor, 2)
-+define(pkg_extra, 1)
- define(pkg_maintainer, libunwind-devel@nongnu.org)
- define(mkvers, $1.$2$3)
- dnl Process this file with autoconf to produce a configure script.