diff --git a/src/vuefire.js b/src/vuefire.js
index 03d183af..60552c83 100644
--- a/src/vuefire.js
+++ b/src/vuefire.js
@@ -197,6 +197,7 @@ function ensureRefs (vm) {
 
 var init = function () {
   var bindings = this.$options.firebase
+  if (typeof bindings === 'function') bindings = bindings.call(this)
   if (!bindings) return
   ensureRefs(this)
   for (var key in bindings) {
diff --git a/tests/vuefire.spec.js b/tests/vuefire.spec.js
index f5877fe5..ae5599f5 100644
--- a/tests/vuefire.spec.js
+++ b/tests/vuefire.spec.js
@@ -25,6 +25,19 @@ describe('VueFire', function () {
     })
   })
 
+  describe('support Function options', function () {
+    it('option is callable as function', function (done) {
+      var spy = sinon.spy()
+      expect(function () {
+        new Vue({
+          firebase: spy
+        }).$mount()
+      }).to.not.throw()
+      expect(spy.calledOnce).to.be.true
+      done()
+    })
+  })
+
   describe('bind as Array', function () {
     it('throws error for invalid firebase ref', function () {
       helpers.invalidFirebaseRefs.forEach(function (ref) {