diff --git a/src/oca/ruby/opennebula/client.rb b/src/oca/ruby/opennebula/client.rb
index 3f730d0bab..a733dd5269 100644
--- a/src/oca/ruby/opennebula/client.rb
+++ b/src/oca/ruby/opennebula/client.rb
@@ -130,7 +130,7 @@ module OpenNebula
                 raise "ONE_AUTH file not present"
             end
 
-            @one_auth.rstrip!
+            @one_auth = @one_auth.rstrip
 
             if endpoint
                 @one_endpoint = endpoint
@@ -143,8 +143,8 @@ module OpenNebula
             else
                 @one_endpoint = "http://localhost:2633/RPC2"
             end
-            
-            @one_endpoint.rstrip!
+
+            @one_endpoint= @one_endpoint.rstrip
 
             @async = !options[:sync]