diff --git a/common/rfb/ClientParams.h b/common/rfb/ClientParams.h
index 63d4e19..f7a7044 100644
--- a/common/rfb/ClientParams.h
+++ b/common/rfb/ClientParams.h
@@ -87,6 +87,7 @@
     // Wrappers to check for functionality rather than specific
     // encodings
     bool supportsLocalCursor() const;
+    bool supportsDesktopSize() const;
     bool supportsLEDState() const;
     bool supportsFence() const;
     bool supportsContinuousUpdates() const;