diff --git a/pkgs/games/openmw/tes3mp.nix b/pkgs/games/openmw/tes3mp.nix
index 5922b7214c51..915c006f9137 100644
--- a/pkgs/games/openmw/tes3mp.nix
+++ b/pkgs/games/openmw/tes3mp.nix
@@ -98,9 +98,18 @@ let
     '';
 
     patches = [
+      # glibc-2.34 support
       (fetchpatch {
         url = "https://gitlab.com/OpenMW/openmw/-/commit/98a7d90ee258ceef9c70b0b2955d0458ec46f048.patch";
-        sha256 = "sha256-RhbIGeE6GyqnipisiMTwWjcFnIiR055hUPL8IkjPgZw=";
+        hash = "sha256-RhbIGeE6GyqnipisiMTwWjcFnIiR055hUPL8IkjPgZw=";
+      })
+
+      # gcc-13 build fix:
+      #   https://github.com/TES3MP/TES3MP/pull/674
+      (fetchpatch {
+        name = "gcc-13.patch";
+        url = "https://github.com/TES3MP/TES3MP/commit/7921f71a79e96f817a2009100e5105a7948b3fe2.patch";
+        hash = "sha256-mpxuOSPA2xixgBeYXsxutEUI7VJL5PxAeZgaNU7YkJQ=";
       })
 
       # https://github.com/TES3MP/openmw-tes3mp/issues/552