diff --git a/src/gcal-month-view.c b/src/gcal-month-view.c
index 45ad5354..b6e91691 100644
--- a/src/gcal-month-view.c
+++ b/src/gcal-month-view.c
@@ -840,7 +840,8 @@ gcal_month_view_motion_notify_event (GtkWidget      *widget,
 
   priv = gcal_month_view_get_instance_private (GCAL_MONTH_VIEW (widget));
 
-  if (priv->start_mark_cell == -1)
+  if (priv->start_mark_cell == -1 ||
+      priv->clicked_cell == -1)
     return FALSE;
 
   width = gtk_widget_get_allocated_width (widget);