diff --git a/remodel-plugin/src/plugins/iglistdiffable.ts b/remodel-plugin/src/plugins/iglistdiffable.ts
index 4529f04a..bded4614 100644
--- a/remodel-plugin/src/plugins/iglistdiffable.ts
+++ b/remodel-plugin/src/plugins/iglistdiffable.ts
@@ -20,6 +20,7 @@ import ObjectSpecCodeUtils = require('../object-spec-code-utils');
 
 function isEqualToDiffableObjectMethod():ObjC.Method {
   return {
+    preprocessors:[],
     belongsToProtocol:Maybe.Just<string>('IGListDiffable'),
     code: ['return [self isEqual:object];'],
     comments:[],
@@ -147,6 +148,7 @@ function diffIdentifierMethodImplementation(objectType:ObjectSpec.Type):string[]
 
 function diffIdentifierMethod(objectType:ObjectSpec.Type):ObjC.Method {
   return {
+    preprocessors:[],
     belongsToProtocol:Maybe.Just<string>('IGListDiffable'),
     code: diffIdentifierMethodImplementation(objectType),
     comments:[],