diff --git a/lib/thrift/sasl_client_transport.rb b/lib/thrift/sasl_client_transport.rb
index 7361a3a..9c254e3 100644
--- a/lib/thrift/sasl_client_transport.rb
+++ b/lib/thrift/sasl_client_transport.rb
@@ -70,7 +70,7 @@ def initiate_hand_shake
       when NEGOTIATION_STATUS[:BAD], NEGOTIATION_STATUS[:ERROR]
         raise @transport.to_io.read(len)
       when NEGOTIATION_STATUS[:COMPLETE]
-        @challenge = @transport.to_io.read len
+        @challenge = ""
       when NEGOTIATION_STATUS[:OK]
         raise "Failed to complete challenge exchange: only NONE supported currently"
       end