diff --git a/pkgs/by-name/gn/gnujump/fix-c23-prototypes.patch b/pkgs/by-name/gn/gnujump/fix-c23-prototypes.patch
new file mode 100644
index 000000000000..ef5c36c0e0a3
--- /dev/null
+++ b/pkgs/by-name/gn/gnujump/fix-c23-prototypes.patch
@@ -0,0 +1,16 @@
+diff --git a/src/game.h b/src/game.h
+index fc75acc..fd511a8 100644
+--- a/src/game.h
++++ b/src/game.h
+@@ -207,9 +207,9 @@ void continueTimer (L_timer * time);
+ 
+ int yesNoQuestion (data_t * gfx, game_t * game, char *text);
+ 
+-int updateInput ();
++int updateInput (game_t * game);
+ 
+-void freeGame ();
++void freeGame (game_t * game);
+ 
+ void drawGame (data_t * gfx, game_t * game);
+ 
diff --git a/pkgs/by-name/gn/gnujump/package.nix b/pkgs/by-name/gn/gnujump/package.nix
index db5765e101a4..34b4522f06cf 100644
--- a/pkgs/by-name/gn/gnujump/package.nix
+++ b/pkgs/by-name/gn/gnujump/package.nix
@@ -28,6 +28,8 @@ stdenv.mkDerivation (finalAttrs: {
     SDL_mixer
   ];
 
+  patches = [ ./fix-c23-prototypes.patch ];
+
   env.NIX_LDFLAGS = "-lm";
 
   desktopItems = [