diff --git a/pkgs/applications/misc/mkgmap/default.nix b/pkgs/applications/misc/mkgmap/default.nix
index 390bc0141337..2e2a02dc5d39 100644
--- a/pkgs/applications/misc/mkgmap/default.nix
+++ b/pkgs/applications/misc/mkgmap/default.nix
@@ -15,12 +15,12 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "mkgmap";
-  version = "4910";
+  version = "4912";
 
   src = fetchsvn {
     url = "https://svn.mkgmap.org.uk/mkgmap/mkgmap/trunk";
     rev = version;
-    sha256 = "sha256-t4SyvDvwNdqKh95MRmHxlX6q84dN0y4ANPIXqS7ynBA=";
+    sha256 = "sha256-4A6N0bhRLKgpLXUSN1iAmIC4YX+BaiUow2YQqnxguRM=";
   };
 
   patches = [