diff --git a/remodel-plugin/src/__tests__/plugins/iglistdiffable-test.ts b/remodel-plugin/src/__tests__/plugins/iglistdiffable-test.ts
index 84f160d7..4e974353 100644
--- a/remodel-plugin/src/__tests__/plugins/iglistdiffable-test.ts
+++ b/remodel-plugin/src/__tests__/plugins/iglistdiffable-test.ts
@@ -21,6 +21,7 @@ const ObjectSpecPlugin = IGListDiffable.createPlugin();
 
 function igListDiffableIsEqualMethod():ObjC.Method {
   return {
+    preprocessors:[],
     belongsToProtocol:Maybe.Just('IGListDiffable'),
     code: ['return [self isEqual:object];'],
     comments:[],
@@ -47,6 +48,7 @@ function igListDiffableIsEqualMethod():ObjC.Method {
 
 function igListDiffableDiffIdentifierMethodWithCode(code:string):ObjC.Method {
   return {
+    preprocessors:[],
     belongsToProtocol:Maybe.Just<string>('IGListDiffable'),
     code: [code],
     comments:[],
diff --git a/remodel-plugin/src/plugins/iglistdiffable.ts b/remodel-plugin/src/plugins/iglistdiffable.ts
index bded4614..b1b432da 100644
--- a/remodel-plugin/src/plugins/iglistdiffable.ts
+++ b/remodel-plugin/src/plugins/iglistdiffable.ts
@@ -211,6 +211,9 @@ export function createPlugin():ObjectSpec.Plugin {
         diffIdentifierMethod(objectType)
       ];
     },
+    macros: function(valueType:ObjectSpec.Type):ObjC.Macro[] {
+      return [];
+    },
     properties: function(objectType:ObjectSpec.Type):ObjC.Property[] {
       return [];
     },