diff --git a/cronjobs/pplns_payout.php b/cronjobs/pplns_payout.php
index 295702c9..7249586d 100755
--- a/cronjobs/pplns_payout.php
+++ b/cronjobs/pplns_payout.php
@@ -47,6 +47,7 @@ foreach ($aAllBlocks as $iIndex => $aBlock) {
   if (!$aBlock['accounted']) {
     $iPreviousShareId = @$aAllBlocks[$iIndex - 1]['share_id'] ? $aAllBlocks[$iIndex - 1]['share_id'] : 0;
     $iCurrentUpstreamId = $aBlock['share_id'];
+    if (!is_number($iCurrentUpstreamId)) die("Block " . $aBlock['height'] . " has no share_id associated with it, not going to continue\n");
     $iRoundShares = $share->getRoundShares($iPreviousShareId, $aBlock['share_id']);
     $config['reward_type'] == 'block' ? $dReward = $aBlock['amount'] : $dReward = $config['reward'];
     $aRoundAccountShares = $share->getSharesForAccounts($iPreviousShareId, $aBlock['share_id']);