1 files changed, 1 insertions, 1 deletions
diff --git a/Swiften/Avatars/AvatarProvider.h b/Swiften/Avatars/AvatarProvider.h
index 5c9460d..3606376 100644
--- a/Swiften/Avatars/AvatarProvider.h
+++ b/Swiften/Avatars/AvatarProvider.h
@@ -12,14 +12,14 @@
 #include <Swiften/Base/boost_bsignals.h>
 
 namespace Swift {
 	class JID;
 
 	class SWIFTEN_API AvatarProvider {
 		public:
 			virtual ~AvatarProvider();
 
-			virtual std::string getAvatarHash(const JID&) const = 0;
+			virtual boost::optional<std::string> getAvatarHash(const JID&) const = 0;
 
 			boost::signal<void (const JID&)> onAvatarChanged;
 	};
 }