diff --git a/pkgs/development/libraries/proj/default.nix b/pkgs/development/libraries/proj/default.nix
index 85962d56cc30..87f5fe96f1aa 100644
--- a/pkgs/development/libraries/proj/default.nix
+++ b/pkgs/development/libraries/proj/default.nix
@@ -1,22 +1,13 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation {
-  name = "proj-4.8.0";
+  name = "proj-4.9.1";
 
   src = fetchurl {
-    url = http://download.osgeo.org/proj/proj-4.8.0.tar.gz;
-    sha256 = "1dfim63ks298204lv2z0v16njz6fs7bf0m4icy09i3ffzvqdpcid";
+    url = http://download.osgeo.org/proj/proj-4.9.1.tar.gz;
+    sha256 = "06f36s7yi6yky92g235kj9wkcckm04qgzxnj0fla3icb7y7ki87w";
   };
 
-  postConfigure = ''
-    patch src/Makefile <<EOF
-    272c272
-    < include_HEADERS = proj_api.h org_proj4_Projections.h
-    ---
-    > include_HEADERS = proj_api.h org_proj4_Projections.h projects.h
-    EOF
-  '';
-
   meta = with stdenv.lib; {
     description = "Cartographic Projections Library";
     homepage = http://trac.osgeo.org/proj/;