diff --git a/src/popupwin.c b/src/popupwin.c
index 4cc7dec..aae5465 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -2053,6 +2053,8 @@
 	    }
 	}
     }
+    else if (popup_is_notification(type))
+	tabnr = -1;  // show on all tabs
 
     // Create the window and buffer.
     wp = win_alloc_popup_win();