diff --git a/src/matrix-client.vala b/src/matrix-client.vala
index 3fef5f7..4a85d07 100644
--- a/src/matrix-client.vala
+++ b/src/matrix-client.vala
@@ -190,7 +190,7 @@ public interface Matrix.Client : GLib.Object {
      * state is not cached yet, Matrix.Error.UNAVAILABLE is
      * thrown.
      */
-    public abstract Presence?
+    public abstract Presence
     get_user_presence(string user_id, string? room_id = null)
         throws Matrix.Error;
 }
diff --git a/src/matrix-http-client.vala b/src/matrix-http-client.vala
index 7522ae2..973d893 100644
--- a/src/matrix-http-client.vala
+++ b/src/matrix-http-client.vala
@@ -420,7 +420,7 @@ public class Matrix.HTTPClient : Matrix.HTTPAPI, Matrix.Client {
                 "Per-room profiles are not supported yet.");
     }
 
-    public Presence?
+    public Presence
     get_user_presence(string user_id, string? room_id = null)
         throws Matrix.Error
     {