diff --git a/lib/searchkick.rb b/lib/searchkick.rb
index 0963330..69ddcb5 100644
--- a/lib/searchkick.rb
+++ b/lib/searchkick.rb
@@ -146,7 +146,7 @@ module Searchkick
     end
   end
 
-  def self.callbacks(value)
+  def self.callbacks(value = nil)
     if block_given?
       previous_value = callbacks_value
       begin
--
libgit2 0.21.0