diff --git a/spice/protocol.h b/spice/protocol.h
index 7008399..0671292 100644
--- a/spice/protocol.h
+++ b/spice/protocol.h
@@ -128,6 +128,7 @@ enum {
     SPICE_DISPLAY_CAP_SIZED_STREAM,
     SPICE_DISPLAY_CAP_MONITORS_CONFIG,
     SPICE_DISPLAY_CAP_COMPOSITE,
+    SPICE_DISPLAY_CAP_A8_SURFACE,
 };
 
 enum {