diff --git a/protocol-spec/core.md b/protocol-spec/core.md
index 071832a..39321cf 100644
--- a/protocol-spec/core.md
+++ b/protocol-spec/core.md
@@ -64,7 +64,7 @@ interface BaseMessage {
     /**
      * Message recipients
      */
-    toAddresses: EntityID[],
+    to: EntityID[],
 
     /**
      * Operation success indicator (used to determine if the error happened while processing request) - MUST be only in response from server