diff --git a/etc/inc/voucher.inc b/etc/inc/voucher.inc
index 863cc171e5..b3de23c57b 100644
--- a/etc/inc/voucher.inc
+++ b/etc/inc/voucher.inc
@@ -249,8 +249,10 @@ function voucher_expire($voucher_received) {
 	// Roll# and Ticket# using the external readvoucher binary
 	foreach ($a_vouchers_received as $voucher) {
 		$v = escapeshellarg($voucher);
-		if (strlen($voucher) < 3)
+		if (strlen($voucher) < 5) {
+			captiveportal_syslog("{$voucher} invalid: Too short!");
 			continue;   // seems too short to be a voucher!
+		}
 
 		unset($output);
 		$_gb = exec("/usr/local/bin/voucher -c {$g['varetc_path']}/voucher_{$cpzone}.cfg -k {$g['varetc_path']}/voucher_{$cpzone}.public -- $v", $output);
@@ -371,7 +373,7 @@ function voucher_auth($voucher_received, $test = 0) {
 	// Roll# and Ticket# using the external readvoucher binary
 	foreach ($a_vouchers_received as $voucher) {
 		$v = escapeshellarg($voucher);
-		if (strlen($voucher) < 3) {
+		if (strlen($voucher) < 5) {
 			$test_result[] = "{$voucher} invalid: Too short!";
 			captiveportal_syslog("{$voucher} invalid: Too short!");
 			$error++;