--- a/cinnamon-session/main.c
+++ b/cinnamon-session/main.c
@@ -383,8 +383,11 @@
          */
         csm_util_setenv ("GNOME_DESKTOP_SESSION_ID", "this-is-deprecated");
 
-        /* Make QT5 apps follow the GTK style */
-        csm_util_setenv ("QT_STYLE_OVERRIDE", "gtk");
+        /* Make QT5 apps configurable using the qt5ct tool
+         */
+        if (g_getenv ("QT_QPA_PLATFORMTHEME") == NULL) {
+                csm_util_setenv ("QT_QPA_PLATFORMTHEME", "qt5ct");
+        }
 
         /* GTK Overlay scrollbars */
         settings = g_settings_new ("org.cinnamon.desktop.interface");