diff --git a/cronjobs/pps_payout.php b/cronjobs/pps_payout.php
index bf8513fa..7a2ed5e9 100755
--- a/cronjobs/pps_payout.php
+++ b/cronjobs/pps_payout.php
@@ -32,7 +32,7 @@ if ($config['payout_system'] != 'pps') {
 // Fetch all transactions since our last block
 if ( $bitcoin->can_connect() === true ){
   $dDifficulty = $bitcoin->getdifficulty();
-  if (strtolower($config['currency']) == 'pos')
+  if (is_array($dDifficulty) && array_key_exists('proof-of-work', $dDifficulty))
     $dDifficulty = $dDifficulty['proof-of-work'];
 } else {
   verbose("Aborted: " . $bitcoin->can_connect() . "\n");
diff --git a/public/include/pages/api/getdifficulty.inc.php b/public/include/pages/api/getdifficulty.inc.php
index 4d721e93..0a133464 100644
--- a/public/include/pages/api/getdifficulty.inc.php
+++ b/public/include/pages/api/getdifficulty.inc.php
@@ -11,7 +11,7 @@ $id = $user->checkApiKey($_REQUEST['api_key']);
 if ($bitcoin->can_connect() === true){
   if (!$dDifficulty = $memcache->get('dDifficulty')) {
     $dDifficulty = $bitcoin->query('getdifficulty');
-    if (strtolower($config['currency']) == 'pos')
+    if (is_array($dDifficulty) && array_key_exists('proof-of-work', $dDifficulty))
       $dDifficulty = $dDifficulty['proof-of-work'];
     $memcache->set('dDifficulty', $dDifficulty);
   }
diff --git a/public/include/pages/statistics.inc.php b/public/include/pages/statistics.inc.php
index a09aa3cb..dc27fde6 100644
--- a/public/include/pages/statistics.inc.php
+++ b/public/include/pages/statistics.inc.php
@@ -6,7 +6,7 @@ if (!defined('SECURITY'))
 
 if ($bitcoin->can_connect() === true){
   $dDifficulty = $bitcoin->query('getdifficulty');
-  if (strtolower($config['currency']) == 'pos')
+  if (is_array($dDifficulty) && array_key_exists('proof-of-work', $dDifficulty))
     $dDifficulty = $dDifficulty['proof-of-work'];
   $iBlock = $bitcoin->query('getblockcount');
 } else {
diff --git a/public/include/pages/statistics/pool.inc.php b/public/include/pages/statistics/pool.inc.php
index d8c996ad..12605353 100644
--- a/public/include/pages/statistics/pool.inc.php
+++ b/public/include/pages/statistics/pool.inc.php
@@ -7,7 +7,7 @@ if (!defined('SECURITY'))
 // Fetch data from litecoind
 if ($bitcoin->can_connect() === true){
   $dDifficulty = $bitcoin->getdifficulty();
-  if (strtolower($config['currency']) == 'pos')
+  if (is_array($dDifficulty) && array_key_exists('proof-of-work', $dDifficulty))
     $dDifficulty = $dDifficulty['proof-of-work'];
   $iBlock = $bitcoin->getblockcount();
 } else {
diff --git a/public/include/smarty_globals.inc.php b/public/include/smarty_globals.inc.php
index 9e77c923..aa0559d2 100644
--- a/public/include/smarty_globals.inc.php
+++ b/public/include/smarty_globals.inc.php
@@ -16,7 +16,7 @@ if (@$_SESSION['AUTHENTICATED']) {
   $aRoundShares = $statistics->getRoundShares();
   if ($bitcoin->can_connect() === true) {
     $dDifficulty = $bitcoin->query('getdifficulty');
-    if (strtolower($config['currency']) == 'pos')
+    if (is_array($dDifficulty) && array_key_exists('proof-of-work', $dDifficulty))
       $dDifficulty = $dDifficulty['proof-of-work'];
   }
 }