diff --git a/src/platformtheme/kdeplatformtheme.cpp b/src/platformtheme/kdeplatformtheme.cpp
--- a/src/platformtheme/kdeplatformtheme.cpp
+++ b/src/platformtheme/kdeplatformtheme.cpp
@@ -54,6 +54,9 @@
         m_x11Integration.reset(new X11Integration());
         m_x11Integration->init();
     }
+
+    // HACK Qt does not automatically set the layout direction for the respective locale
+    QGuiApplication::setLayoutDirection(QLocale().textDirection());
 }
 
 KdePlatformTheme::~KdePlatformTheme()