diff --git a/lib/blazer/data_source.rb b/lib/blazer/data_source.rb
index ebac3abd..19b45f75 100644
--- a/lib/blazer/data_source.rb
+++ b/lib/blazer/data_source.rb
@@ -107,7 +107,7 @@ def run_statement(statement, options = {})
       end
 
       unless result
-        comment = "blazer"
+        comment = "blazer".dup
         if options[:user].respond_to?(:id)
           comment << ",user_id:#{options[:user].id}"
         end