diff --git a/lib/steem/transaction_builder.rb b/lib/steem/transaction_builder.rb
index 19382705b0b717366c3f18d71cefedb2e2e1fd4f..7927b96845aa8e6668680047224c01c90d270bbc 100644
--- a/lib/steem/transaction_builder.rb
+++ b/lib/steem/transaction_builder.rb
@@ -33,7 +33,7 @@ module Steem
     alias app_base? app_base
     
     def initialize(options = {})
-      @app_base = options[:app_base].nil? || !!options[:app_base]
+      @app_base = !!options[:app_base] # default false
       @database_api = options[:database_api]
       @block_api = options[:block_api]