diff --git a/pkgs/applications/misc/mkgmap/default.nix b/pkgs/applications/misc/mkgmap/default.nix
index 2726f37f4aa0..195c083fbfe9 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 = "4905";
+  version = "4906";
 
   src = fetchsvn {
     url = "https://svn.mkgmap.org.uk/mkgmap/mkgmap/trunk";
     rev = version;
-    sha256 = "sha256-EYUysLit/bO/IjVmAbxqIvVFm9Ub50+RKFn7ZdspapU=";
+    sha256 = "sha256-N1VU5XOENCQiUnDCFpotx+8Pr3VFuWLu1ABcbm0feOM=";
   };
 
   patches = [