1 files changed, 4 insertions, 0 deletions
diff --git a/lib/config/index.js b/lib/config/index.js
index edc048c..a59cbd7 100644
--- a/lib/config/index.js
+++ b/lib/config/index.js
@@ -3,6 +3,7 @@ var semver = require('semver');
 
 var gitbook = require('../gitbook');
 var Promise = require('../utils/promise');
+var error = require('../utils/error');
 var validator = require('./validator');
 var plugins = require('./plugins');
 
@@ -90,6 +91,9 @@ Config.prototype.replace = function(options) {
             return that.book.parent? that.book.parent.root : undefined;
         }
     });
+
+    error.deprecateField(this.options, 'generator', (this.book.output? this.book.output.name : null), '"options.generator" property is deprecated, use "output.name" instead');
+    error.deprecateField(this.options, 'output', (this.book.output? this.book.output.root() : null), '"options.output" property is deprecated, use "output.root()" instead');
 };
 
 // Return true if book has a configuration file