diff --git a/pexpect/pxssh.py b/pexpect/pxssh.py
index 3d53bd97..bfefc7a1 100644
--- a/pexpect/pxssh.py
+++ b/pexpect/pxssh.py
@@ -143,8 +143,7 @@ def __init__ (self, timeout=30, maxread=2000, searchwindowsize=None,
         # used to set shell command-line prompt to UNIQUE_PROMPT.
         self.PROMPT_SET_SH = r"PS1='[PEXPECT]\$ '"
         self.PROMPT_SET_CSH = r"set prompt='[PEXPECT]\$ '"
-        self.SSH_OPTS = ("-o'RSAAuthentication=no'"
-                + " -o 'PubkeyAuthentication=no'")
+        self.SSH_OPTS = (" -o 'PubkeyAuthentication=no'")
 # Disabling host key checking, makes you vulnerable to MITM attacks.
 #                + " -o 'StrictHostKeyChecking=no'"
 #                + " -o 'UserKnownHostsFile /dev/null' ")
@@ -152,7 +151,7 @@ def __init__ (self, timeout=30, maxread=2000, searchwindowsize=None,
         # displaying a GUI password dialog. I have not figured out how to
         # disable only SSH_ASKPASS without also disabling X11 forwarding.
         # Unsetting SSH_ASKPASS on the remote side doesn't disable it! Annoying!
-        #self.SSH_OPTS = "-x -o'RSAAuthentication=no' -o 'PubkeyAuthentication=no'"
+        #self.SSH_OPTS = "-x -o 'PubkeyAuthentication=no'"
         self.force_password = False
 
         self.debug_command_string = debug_command_string