diff --git a/index.js b/index.js
index febdfbf..fc8761b 100644
--- a/index.js
+++ b/index.js
@@ -37,15 +37,23 @@ function set(target, path, value, options) {
   for (let i = 0; i < len; i++) {
     let prop = keys[i];
 
-    if (i === len - 1) {
-      result(target, prop, value, merge);
-      break;
+    if (i < len - 1 && !isNaN(keys[i + 1]) && !target[prop]) {
+      target[prop] = [];
+    }
+
+    if (!isNaN(prop)) {
+      target.push({});
     }
 
     if (!isObject(target[prop])) {
       target[prop] = {};
     }
 
+    if (i === len - 1) {
+      result(target, prop, value, merge);
+      break;
+    }
+
     target = target[prop];
   }
 
@@ -107,4 +115,4 @@ function isObject(val) {
 }
 
 set.memo = {};
-module.exports = set;
+module.exports = set;
\ No newline at end of file
diff --git a/test.js b/test.js
index 44c5102..f8b36a4 100644
--- a/test.js
+++ b/test.js
@@ -81,6 +81,17 @@ describe('set', function() {
     assert.deepEqual(o.a[2].c, {y: 'z'});
   });
 
+  it('should create an array if it does not already exist', function() {
+    var o = {};
+    set(o, 'a.0.a', {y: 'z'});
+    set(o, 'a.1.b', {y: 'z'});
+    set(o, 'a.2.c', {y: 'z'});
+    assert(Array.isArray(o.a));
+    assert.deepEqual(o.a[0].a, {y: 'z'});
+    assert.deepEqual(o.a[1].b, {y: 'z'});
+    assert.deepEqual(o.a[2].c, {y: 'z'});
+  });
+
   it('should create a deeply nested property if it does not already exist', function() {
     var o = {};
     set(o, 'a.b.c.d.e', 'c');