diff --git a/pkgs/applications/misc/mkgmap/default.nix b/pkgs/applications/misc/mkgmap/default.nix
index 89a64457fd57..29bd197a9d6b 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 = "4902";
+  version = "4904";
 
   src = fetchsvn {
     url = "https://svn.mkgmap.org.uk/mkgmap/mkgmap/trunk";
     rev = version;
-    sha256 = "sha256-djqa6loaFUYfAhgmF6Lm+4M4Xgzyiw1bXqK4XWqT/tY=";
+    sha256 = "sha256-43gJkpk19Ef3vUbRNt3VDstxCLJl6smsAjtcrovGjEE=";
   };
 
   patches = [