diff -Npur polkit-0.113.orig/src/programs/pkexec.c polkit-0.113/src/programs/pkexec.c
--- polkit-0.113.orig/src/programs/pkexec.c	2015-06-18 22:20:50.000000000 +0200
+++ polkit-0.113/src/programs/pkexec.c	2016-06-28 23:16:53.439339179 +0200
@@ -483,6 +483,14 @@ main (int argc, char *argv[])
      */
     "DISPLAY",
     "XAUTHORITY",
+    "KDE_FULL_SESSION",
+    "KDE_SESSION_VERSION",
+    "DESKTOP_SESSION",
+    "GNOME_DESKTOP_SESSION_ID",
+    "XDG_CURRENT_DESKTOP",
+    "QT_STYLE_OVERRIDE",
+    "QT_XCB_FORCE_SOFTWARE_OPENGL",
+    "QT_QPA_PLATFORMTHEME",
     NULL
   };
   GPtrArray *saved_env;