diff --git a/src/project.coffee b/src/project.coffee
index 81f7eaa8c..8f58ae9f6 100644
--- a/src/project.coffee
+++ b/src/project.coffee
@@ -31,7 +31,6 @@ class Project extends Model
 
   constructor: ({path, @buffers}={}) ->
     @buffers ?= []
-    @openers = []
 
     for buffer in @buffers
       do (buffer) =>
@@ -321,12 +320,12 @@ class Project extends Model
   # Deprecated: delegate
   registerOpener: (opener) ->
     deprecate("Use Workspace::registerOpener instead")
-    @openers.push(opener)
+    atom.workspace.registerOpener(opener)
 
   # Deprecated: delegate
   unregisterOpener: (opener) ->
     deprecate("Use Workspace::unregisterOpener instead")
-    _.remove(@openers, opener)
+    atom.workspace.unregisterOpener(opener)
 
   # Deprecated: delegate
   eachEditor: (callback) ->
diff --git a/src/workspace.coffee b/src/workspace.coffee
index 18b253e1b..7d568bd1b 100644
--- a/src/workspace.coffee
+++ b/src/workspace.coffee
@@ -28,6 +28,8 @@ class Workspace extends Model
 
   constructor: ->
     super
+
+    @openers = []
     @subscribe @paneContainer, 'item-destroyed', @onPaneItemDestroyed
     @registerOpener (filePath) =>
       switch filePath
@@ -172,11 +174,11 @@ class Workspace extends Model
   #
   # opener - A {Function} to be called when a path is being opened.
   registerOpener: (opener) ->
-    atom.project.registerOpener(opener)
+    @openers.push(opener)
 
   # Public: Unregister an opener registered with {::registerOpener}.
   unregisterOpener: (opener) ->
-    atom.project.unregisterOpener(opener)
+    _.remove(@openers, opener)
 
   getOpeners: ->
     atom.project.openers