diff --git a/phpseclib/Net/SSH1.php b/phpseclib/Net/SSH1.php
index b7b7cd8a..bdb57dbd 100644
--- a/phpseclib/Net/SSH1.php
+++ b/phpseclib/Net/SSH1.php
@@ -1169,7 +1169,7 @@ class Net_SSH1
 
         while ($length > 0) {
             $temp = fread($this->fsock, $length);
-            if (stlren($temp) != $length) {
+            if (strlen($temp) != $length) {
                 return false;
             }
             $raw.= $temp;