diff --git a/startkde/startkde.cmake b/startkde/startkde.cmake
--- a/startkde/startkde.cmake
+++ b/startkde/startkde.cmake
@@ -94,6 +94,10 @@
 #otherwise apps that manually opt in for high DPI get auto scaled by the developer AND manually scaled by us
 export QT_AUTO_SCREEN_SCALE_FACTOR=0
 
+#Set the QtQuickControls style to our own: for QtQuickControls1
+#it will fall back to Desktop, while it will use our own org.kde.desktop
+#for QtQuickControlsStyle and Kirigami
+export QT_QUICK_CONTROLS_STYLE=org.kde.desktop
 
 # XCursor mouse theme needs to be applied here to work even for kded or ksmserver
 if test -n "$kcminputrc_mouse_cursortheme" -o -n "$kcminputrc_mouse_cursorsize" ; then
diff --git a/startkde/startplasma.cmake b/startkde/startplasma.cmake
--- a/startkde/startplasma.cmake
+++ b/startkde/startplasma.cmake
@@ -49,6 +49,11 @@
   esac
 fi
 
+#Set the QtQuickControls style to our own: for QtQuickControls1
+#it will fall back to Desktop, while it will use our own org.kde.desktop
+#for QtQuickControlsStyle and Kirigami
+export QT_QUICK_CONTROLS_STYLE=org.kde.desktop
+
 # Activate the kde font directories.
 #
 # There are 4 directories that may be used for supplying fonts for KDE.