diff --git a/Sources/DispatchData.swift b/Sources/DispatchData.swift
index 2845581..ac8ee1e 100644
--- a/Sources/DispatchData.swift
+++ b/Sources/DispatchData.swift
@@ -15,13 +15,13 @@ public struct DispatchData<T: IntegerType>: DispatchObject {
         return DispatchData(raw: dispatch_data_empty)
     }
 
-    public let data: dispatch_data_t
-    
-    public var rawValue: dispatch_object_t {
+    public let data: dispatch_data_t!
+
+    public var rawValue: dispatch_object_t! {
         return data
     }
 
-    public init(raw data: dispatch_data_t) {
+    public init(raw data: dispatch_data_t!) {
         self.data = data
     }
 
diff --git a/Sources/DispatchGroup.swift b/Sources/DispatchGroup.swift
index fe9915b..d2a2a3d 100644
--- a/Sources/DispatchGroup.swift
+++ b/Sources/DispatchGroup.swift
@@ -9,13 +9,13 @@ import Foundation
 
 public struct DispatchGroup: DispatchObject, DispatchEnterable, DispatchWaitable {
 
-    public let group: dispatch_group_t
-    
-    public var rawValue: dispatch_object_t {
+    public let group: dispatch_group_t!
+
+    public var rawValue: dispatch_object_t! {
         return group
     }
 
-    public init(raw group: dispatch_group_t) {
+    public init(raw group: dispatch_group_t!) {
         self.group = group
     }
 
diff --git a/Sources/DispatchIO.swift b/Sources/DispatchIO.swift
index 915fb28..077464b 100644
--- a/Sources/DispatchIO.swift
+++ b/Sources/DispatchIO.swift
@@ -58,13 +58,13 @@ public typealias DispatchIOIntervalFlags = DKDispatchIOIntervalFlags
 
 public struct DispatchIO: DispatchObject {
 
-    public let io: dispatch_io_t
-    
-    public var rawValue: dispatch_object_t {
+    public let io: dispatch_io_t!
+
+    public var rawValue: dispatch_object_t! {
         return io
     }
 
-    public init(raw io: dispatch_io_t) {
+    public init(raw io: dispatch_io_t!) {
         self.io = io
     }
 
diff --git a/Sources/DispatchObject.swift b/Sources/DispatchObject.swift
index b3dff7e..e67f839 100644
--- a/Sources/DispatchObject.swift
+++ b/Sources/DispatchObject.swift
@@ -12,8 +12,7 @@ public protocol DispatchCookie: class {
 }
 
 public protocol DispatchObject {
-    
-    var rawValue: dispatch_object_t { get }
+    var rawValue: dispatch_object_t! { get }
     func getContext<Cookie: DispatchCookie>() -> Cookie?
     func setContext<Cookie: DispatchCookie>(context: Cookie?)
     
diff --git a/Sources/DispatchQueue.swift b/Sources/DispatchQueue.swift
index 868cdbd..e5ab483 100644
--- a/Sources/DispatchQueue.swift
+++ b/Sources/DispatchQueue.swift
@@ -29,13 +29,13 @@ internal func dk_dispatch_queue_create_with_qos_class(label: String!, attr: disp
 
 public struct DispatchQueue: DispatchObject, DispatchResumable {
     
-    public let queue: dispatch_queue_t
-    
-    public var rawValue: dispatch_object_t {
+    public let queue: dispatch_queue_t!
+
+    public var rawValue: dispatch_object_t! {
         return queue
     }
 
-    public init(raw queue: dispatch_queue_t) {
+    public init(raw queue: dispatch_queue_t!) {
         self.queue = queue
     }
 
diff --git a/Sources/DispatchSemaphore.swift b/Sources/DispatchSemaphore.swift
index 90499a3..061c411 100644
--- a/Sources/DispatchSemaphore.swift
+++ b/Sources/DispatchSemaphore.swift
@@ -9,13 +9,13 @@ import Foundation
 
 public struct DispatchSemaphore: DispatchObject, DispatchWaitable {
 
-    public let semaphore: dispatch_semaphore_t
-    
-    public var rawValue: dispatch_object_t {
+    public let semaphore: dispatch_semaphore_t!
+
+    public var rawValue: dispatch_object_t! {
         return semaphore
     }
 
-    public init(raw semaphore: dispatch_semaphore_t) {
+    public init(raw semaphore: dispatch_semaphore_t!) {
         self.semaphore = semaphore
     }
 
diff --git a/Sources/DispatchSource.swift b/Sources/DispatchSource.swift
index 831ecaa..1589069 100644
--- a/Sources/DispatchSource.swift
+++ b/Sources/DispatchSource.swift
@@ -9,13 +9,13 @@ import Foundation
 
 public struct DispatchSource: DispatchObject, DispatchResumable, DispatchCancelable {
 
-    public let source: dispatch_source_t
-    
-    public var rawValue: dispatch_object_t {
+    public let source: dispatch_source_t!
+
+    public var rawValue: dispatch_object_t! {
         return source
     }
 
-    public init(raw source: dispatch_source_t) {
+    public init(raw source: dispatch_source_t!) {
         self.source = source
     }