diff --git a/pkgs/applications/science/chemistry/pymol/default.nix b/pkgs/applications/science/chemistry/pymol/default.nix
index 63ee52c6ed41..1733ba2f236c 100644
--- a/pkgs/applications/science/chemistry/pymol/default.nix
+++ b/pkgs/applications/science/chemistry/pymol/default.nix
@@ -60,7 +60,6 @@ python3Packages.buildPythonApplication rec {
   nativeBuildInputs = [ qt5.wrapQtAppsHook ];
   buildInputs = [ python3Packages.numpy python3Packages.pyqt5 glew glm libpng libxml2 freetype msgpack netcdf ];
   env.NIX_CFLAGS_COMPILE = "-I ${libxml2.dev}/include/libxml2";
-  hardeningDisable = [ "format" ];
 
   postInstall = with python3Packages; ''
     wrapProgram $out/bin/pymol \