1 files changed, 10 insertions, 9 deletions
diff --git a/Swiften/Network/NATTraversalInterface.h b/Swiften/Network/NATTraversalInterface.h
index c84deba..1655eb6 100644
--- a/Swiften/Network/NATTraversalInterface.h
+++ b/Swiften/Network/NATTraversalInterface.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 Remko Tronçon
+ * Copyright (c) 2011-2018 Isode Limited.
  * Licensed under the simplified BSD license.
  * See Documentation/Licenses/BSD-simplified.txt for more information.
  */
@@ -8,17 +8,18 @@
 
 #include <boost/optional.hpp>
 
+#include <Swiften/Base/API.h>
 #include <Swiften/Network/NATPortMapping.h>
 
 namespace Swift {
-	class NATTraversalInterface {
-		public:
-			virtual ~NATTraversalInterface();
+    class SWIFTEN_API NATTraversalInterface {
+        public:
+            virtual ~NATTraversalInterface();
 
-			virtual bool isAvailable() = 0;
+            virtual bool isAvailable() = 0;
 
-			virtual boost::optional<HostAddress> getPublicIP() = 0;
-			virtual boost::optional<NATPortMapping> addPortForward(int localPort, int publicPort) = 0;
-			virtual bool removePortForward(const NATPortMapping&) = 0;
-	};
+            virtual boost::optional<HostAddress> getPublicIP() = 0;
+            virtual boost::optional<NATPortMapping> addPortForward(unsigned short localPort, unsigned short publicPort) = 0;
+            virtual bool removePortForward(const NATPortMapping&) = 0;
+    };
 }