diff --git a/spec.md b/spec.md
index 12f57a3..46b6598 100644
--- a/spec.md
+++ b/spec.md
@@ -519,7 +519,7 @@ class Talker
 
 ### 4.3 Properties and Constants
 
-Visibility MUST be declared on all properties.
+Visibility MUST be declared on all properties.  If set-visibility is specified, then the general visibility MAY be omitted.
 
 Visibility MUST be declared on all constants.