diff --git a/gdk/gdksurface.c b/gdk/gdksurface.c
index 8424576238..0b51f78c02 100644
--- a/gdk/gdksurface.c
+++ b/gdk/gdksurface.c
@@ -4072,6 +4072,9 @@ add_event_mark (GdkEvent *event,
 
     case GDK_ENTER_NOTIFY:
     case GDK_LEAVE_NOTIFY:
+        message = g_strdup ("");
+        break;
+
     case GDK_TOUCHPAD_SWIPE:
     case GDK_TOUCHPAD_PINCH:
     case GDK_SCROLL: