diff --git a/startkde/startkde.cmake b/startkde/startkde.cmake
--- a/startkde/startkde.cmake
+++ b/startkde/startkde.cmake
@@ -49,6 +49,7 @@
 kcminputrc Mouse cursorSize ''
 ksplashrc KSplash Theme Breeze
 ksplashrc KSplash Engine KSplashQML
+kdeglobals KScreen ScaleFactor ''
 kdeglobals KScreen ScreenScaleFactors ''
 kcmfonts General forceFontDPI 0
 EOF
@@ -94,6 +95,10 @@
 
 if [ "$kdeglobals_kscreen_screenscalefactors" ]; then
     export QT_SCREEN_SCALE_FACTORS="$kdeglobals_kscreen_screenscalefactors"
+    if [ "$kdeglobals_kscreen_scalefactor" -eq "2" ] || [ "$kdeglobals_kscreen_scalefactor" -eq "3" ]; then
+        export GDK_SCALE=$kdeglobals_kscreen_scalefactor
+        export GDK_DPI_SCALE=`awk "BEGIN {print 1/$kdeglobals_kscreen_scalefactor}"`
+    fi
 fi
 #Manually disable auto scaling because we are scaling above
 #otherwise apps that manually opt in for high DPI get auto scaled by the developer AND manually scaled by us