diff --git a/kwotes-lib.pl b/kwotes-lib.pl
index d74110d..d3170c1 100755
--- a/kwotes-lib.pl
+++ b/kwotes-lib.pl
@@ -64,6 +64,11 @@ sub validate_captcha {
 	# get count
 	my $row = $sth->fetchrow_hashref();
 	my $count = $row->{"count"};
+
+	# delete it
+	$sth = $dbh->prepare("DELETE FROM captchas WHERE id=?");
+	$sth->bind_param(1, $cid);
+	$sth->execute();
 	
 	# return
 	return ($count>0);