diff --git a/pkgs/games/gltron/default.nix b/pkgs/games/gltron/default.nix
index ebdd95f70735..77d122b36117 100644
--- a/pkgs/games/gltron/default.nix
+++ b/pkgs/games/gltron/default.nix
@@ -9,6 +9,11 @@ stdenv.mkDerivation rec {
 
   patches = [ ./gentoo-prototypes.patch ];
 
+  postPatch = ''
+     # Fix http://sourceforge.net/p/gltron/bugs/15
+     sed -i /__USE_MISC/d lua/src/lib/liolib.c
+  '';
+
   # The build fails, unless we disable the default -Wall -Werror
   configureFlags = "--disable-warn";
 
@@ -20,6 +25,5 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
-    broken = true; # see http://sourceforge.net/p/gltron/bugs/15
   };
 }