diff --git a/lib/msf/core/session/provider/single_command_shell.rb b/lib/msf/core/session/provider/single_command_shell.rb
index 9781f8a10fc0..3decd0003d75 100644
--- a/lib/msf/core/session/provider/single_command_shell.rb
+++ b/lib/msf/core/session/provider/single_command_shell.rb
@@ -119,7 +119,7 @@ def set_is_echo_shell(timeout, command_separator)
     cmd = "echo #{numeric_token}"
     shell_write(cmd + "#{command_separator}echo #{token}#{command_termination}")
     res = shell_read_until_token(token, 0, timeout)
-    @is_echo_shell = res.include?(cmd)
+    @is_echo_shell = res ? res.include?(cmd) : false
   end
 
   def shell_command_token_win32(cmd, timeout=10)