diff --git a/lib/fog/azure/models/compute/servers.rb b/lib/fog/azure/models/compute/servers.rb
index 9885dfc..56c2554 100644
--- a/lib/fog/azure/models/compute/servers.rb
+++ b/lib/fog/azure/models/compute/servers.rb
@@ -28,7 +28,7 @@ class Azure
       class Servers < Fog::Collection
         model Fog::Compute::Azure::Server
 
-        def all()
+        def all(options = {})
           servers = []
           service.list_virtual_machines.each do |vm|
             hash = {}