diff --git a/src/auto/injector.js b/src/auto/injector.js
index ea154c48dd87..75e377a56142 100644
--- a/src/auto/injector.js
+++ b/src/auto/injector.js
@@ -762,8 +762,7 @@ function createInjector(modulesToLoad) {
           : getService(key)
         );
       }
-      if (!fn.$inject) {
-        // this means that we must be an array.
+      if (isArray(fn)) {
         fn = fn[length];
       }