diff --git a/src/plasmaquick/dialog.h b/src/plasmaquick/dialog.h
--- a/src/plasmaquick/dialog.h
+++ b/src/plasmaquick/dialog.h
@@ -157,7 +157,8 @@
         PopupMenu = NET::PopupMenu,
         Tooltip = NET::Tooltip,
         Notification = NET::Notification,
-        OnScreenDisplay = NET::OnScreenDisplay
+        OnScreenDisplay = NET::OnScreenDisplay,
+        CriticalNotification = NET::CriticalNotification
     };
     Q_ENUM(WindowType)
 
diff --git a/src/plasmaquick/dialog.cpp b/src/plasmaquick/dialog.cpp
--- a/src/plasmaquick/dialog.cpp
+++ b/src/plasmaquick/dialog.cpp
@@ -308,7 +308,7 @@
         }
     }
 
-    if (!q->flags().testFlag(Qt::ToolTip) && type != Dialog::Notification) {
+    if (!q->flags().testFlag(Qt::ToolTip) && type != Dialog::Notification && type != Dialog::CriticalNotification) {
         KWindowEffects::SlideFromLocation slideLocation = KWindowEffects::NoEdge;
 
         switch (location) {
@@ -341,7 +341,7 @@
             q->setFlags(Qt::FramelessWindowHint | q->flags());
         }
 
-        if (type == Dialog::Dock || type == Dialog::Notification || type == Dialog::OnScreenDisplay) {
+        if (type == Dialog::Dock || type == Dialog::Notification || type == Dialog::OnScreenDisplay || type == Dialog::CriticalNotification) {
             KWindowSystem::setOnAllDesktops(q->winId(), true);
         } else {
             KWindowSystem::setOnAllDesktops(q->winId(), false);
@@ -1091,7 +1091,7 @@
         }
     }
 
-    if (type == Dock || type == Notification || type == OnScreenDisplay) {
+    if (type == Dock || type == Notification || type == OnScreenDisplay || type == CriticalNotification) {
         KWindowSystem::setOnAllDesktops(winId(), true);
     } else {
         KWindowSystem::setOnAllDesktops(winId(), false);