1 files changed, 4 insertions, 2 deletions
diff --git a/SwifTools/Dock/NullDock.h b/SwifTools/Dock/NullDock.h
index 9f3c554..137ba03 100644
--- a/SwifTools/Dock/NullDock.h
+++ b/SwifTools/Dock/NullDock.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>
 #include <SwifTools/Dock/Dock.h>
 namespace Swift {
@@ -13,7 +15,7 @@ namespace Swift {
        public:
            NullDock() {}
-            virtual void setNumberOfPendingMessages(int) {
+            virtual void setNumberOfPendingMessages(size_t) {
            }
    };
 }