diff --git a/phpseclib/Net/SFTP/Stream.php b/phpseclib/Net/SFTP/Stream.php
index 30cbc86b..4df25c16 100644
--- a/phpseclib/Net/SFTP/Stream.php
+++ b/phpseclib/Net/SFTP/Stream.php
@@ -169,7 +169,7 @@ class Net_SFTP_Stream {
         if ($host[0] == '$') {
             $host = substr($host, 1);
             global $$host;
-            if (!is_object($$host) || get_class($$host) != 'Net_sFTP') {
+            if (!is_object($$host) || get_class($$host) != 'Net_SFTP') {
                 return false;
             }
             $this->sftp = $$host;