diff --git a/pkgs/applications/misc/mkgmap/default.nix b/pkgs/applications/misc/mkgmap/default.nix
index 19e16d2d854ba..47c566f6b4b7d 100644
--- a/pkgs/applications/misc/mkgmap/default.nix
+++ b/pkgs/applications/misc/mkgmap/default.nix
@@ -17,12 +17,12 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "mkgmap";
-  version = "4922";
+  version = "4923";
 
   src = fetchsvn {
     url = "https://svn.mkgmap.org.uk/mkgmap/mkgmap/trunk";
     rev = version;
-    sha256 = "sha256-LgGdV6l9tjRR4BpGTDTm0MeAq2uiOe7Pv0qv87nbbWw=";
+    sha256 = "sha256-tB/0VFLn/ch7XWPz1sJ3kqy/1U5Hk1yV9+wq7ohTRWw=";
   };
 
   patches = [