diff --git a/src/platformtheme/kwaylandintegration.h b/src/platformtheme/kwaylandintegration.h
--- a/src/platformtheme/kwaylandintegration.h
+++ b/src/platformtheme/kwaylandintegration.h
@@ -26,6 +26,7 @@
 {
 namespace Client
 {
+class ConnectionThread;
 class ServerSideDecorationManager;
 }
 }
@@ -42,6 +43,7 @@
 
 private:
     KWayland::Client::ServerSideDecorationManager *m_decoration;
+    KWayland::Client::ConnectionThread *m_connection;
 };
 
 #endif
diff --git a/src/platformtheme/kwaylandintegration.cpp b/src/platformtheme/kwaylandintegration.cpp
--- a/src/platformtheme/kwaylandintegration.cpp
+++ b/src/platformtheme/kwaylandintegration.cpp
@@ -32,6 +32,7 @@
 KWaylandIntegration::KWaylandIntegration()
     : QObject()
     , m_decoration(Q_NULLPTR)
+    , m_connection(Q_NULLPTR)
 {
 }
 
@@ -43,6 +44,7 @@
     if (!connection) {
         return;
     }
+    m_connection = connection;
     Registry *registry = new Registry(this);
     registry->create(connection);
     QObject::connect(registry, &Registry::interfacesAnnounced, this,
@@ -88,6 +90,7 @@
                     }
                 );
                 w->setProperty("org.kde.plasma.integration.waylandserverdecoration", QVariant::fromValue(deco));
+                m_connection->roundtrip();
                 break;
             }
             case QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed: {