diff --git a/lib/main.js b/lib/main.js
index 1e1eae9e..529e7f35 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -153,7 +153,10 @@ Lambda.prototype._eventSourceList = function (program) {
 
   if (Object.prototype.toString.call(list) === '[object Array]') {
     // backward-compatible
-    return { EventSourceMappings: list };
+    return {
+      EventSourceMappings: list,
+      ScheduleEvents: []
+    };
   }
   if (!list.EventSourceMappings) {
     list.EventSourceMappings = [];
diff --git a/test/main.js b/test/main.js
index f037b8a0..659e3105 100644
--- a/test/main.js
+++ b/test/main.js
@@ -593,7 +593,10 @@ describe('node-lambda', function () {
 
         it('program.eventSourceFile is valid value', function () {
           program.eventSourceFile = fileName;
-          const expected = { EventSourceMappings: oldStyleValue };
+          const expected = {
+            EventSourceMappings: oldStyleValue,
+            ScheduleEvents: []
+          };
           assert.deepEqual(lambda._eventSourceList(program), expected);
         });
       });