diff --git a/tdrop b/tdrop
index 04f820f..84d3991 100755
--- a/tdrop
+++ b/tdrop
@@ -514,6 +514,7 @@ wid_toggle() {
 		if [[ -z $visibility ]] || [[ -z $(xprop -id "$wid") ]]; then
 			# window no longer exists
 			exists=false
+			> /tmp/tdrop/"$term$num"
 		fi
 	else
 		exists=false