diff --git a/src/atom.coffee b/src/atom.coffee
index cffcfa513..86f164626 100644
--- a/src/atom.coffee
+++ b/src/atom.coffee
@@ -123,7 +123,7 @@ class Atom extends Model
   constructor: (@state) ->
     {@mode} = @state
     DeserializerManager = require './deserializer-manager'
-    @deserializers = new DeserializerManager(this)
+    @deserializers = new DeserializerManager()
 
   # Public: Sets up the basic services that should be available in all modes
   # (both spec and application). Call after this instance has been assigned to
diff --git a/src/deserializer-manager.coffee b/src/deserializer-manager.coffee
index e42beb14f..1c431679f 100644
--- a/src/deserializer-manager.coffee
+++ b/src/deserializer-manager.coffee
@@ -14,7 +14,7 @@
 # ```
 module.exports =
 class DeserializerManager
-  constructor: (@environment) ->
+  constructor: ->
     @deserializers = {}
     @deferredDeserializers = {}