diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 19c4298a..566e7d1b 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -1858,6 +1858,10 @@ class Net_SSH2 {
         $raw = fread($this->fsock, $this->decrypt_block_size);
         $stop = strtok(microtime(), ' ') + strtok('');
 
+        if (empty($raw)) {
+            return '';
+        }
+
         if ($this->decrypt !== false) {
             $raw = $this->decrypt->decrypt($raw);
         }
@@ -2013,6 +2017,10 @@ class Net_SSH2 {
                 return false;
             }
 
+            if (empty($response)) {
+                return '';
+            }
+
             extract(unpack('Ctype/Nchannel', $this->_string_shift($response, 5)));
 
             switch ($this->channel_status[$channel]) {