1 files changed, 4 insertions, 2 deletions
diff --git a/SwifTools/Dock/Dock.h b/SwifTools/Dock/Dock.h
index 6120445..362aabc 100644
--- a/SwifTools/Dock/Dock.h
+++ b/SwifTools/Dock/Dock.h
@@ -1,11 +1,13 @@
 /*
- * Copyright (c) 2010 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
 
 #pragma once
 
+#include <cstddef>
+
 namespace Swift {
 
 
@@ -13,6 +15,6 @@ namespace Swift {
         public:
             virtual ~Dock();
 
-            virtual void setNumberOfPendingMessages(int i) = 0;
+            virtual void setNumberOfPendingMessages(size_t i) = 0;
     };
 }