diff --git a/modules/auxiliary/scanner/rservices/rsh_login.rb b/modules/auxiliary/scanner/rservices/rsh_login.rb
index f78e23bb94..156f57271c 100644
--- a/modules/auxiliary/scanner/rservices/rsh_login.rb
+++ b/modules/auxiliary/scanner/rservices/rsh_login.rb
@@ -170,6 +170,9 @@ class Metasploit3 < Msf::Auxiliary
 		buf = sock.get_once(1)
 		if buf != "\x00"
 			buf = sock.get_once(-1)
+			if buf.nil?
+				return :failed
+			end
 			result = buf.gsub(/[[:space:]]+/, ' ')
 			vprint_error("Result: #{result}")
 			return :skip_user if result =~ /locuser too long/