diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 1e815e0e..7cde0875 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3880,7 +3880,11 @@ class Net_SSH2
      */
     function getLastError()
     {
-        return $this->errors[count($this->errors) - 1];
+        $count = count($this->errors);
+
+        if ($count > 0) {
+            return $this->errors[$count - 1];
+        }
     }
 
     /**