diff --git a/pkgs/games/xconq/default.nix b/pkgs/games/xconq/default.nix
index 10a959a676b4..2d28090c595c 100644
--- a/pkgs/games/xconq/default.nix
+++ b/pkgs/games/xconq/default.nix
@@ -19,6 +19,8 @@ stdenv.mkDerivation rec {
     "--with-tkconfig=${tk}/lib"
   ];
 
+  CXXFLAGS = " --std=c++11 ";
+
   hardeningDisable = [ "format" ];
 
   patchPhase = ''