diff --git a/src/Support/ServiceProvider.php b/src/Support/ServiceProvider.php
index 55e1071f4..d24261be0 100644
--- a/src/Support/ServiceProvider.php
+++ b/src/Support/ServiceProvider.php
@@ -22,8 +22,14 @@ class ServiceProvider extends IlluminateServiceProvider
 
     public function extend()
     {
-        foreach (func_get_args() as $extender) {
-            $extender->extend($this->app);
+        // @todo don't support func_get_args
+        foreach (func_get_args() as $extenders) {
+            if (! is_array($extenders)) {
+                $extenders = [$extenders];
+            }
+            foreach ($extenders as $extender) {
+                $extender->extend($this->app);
+            }
         }
     }
 }