diff --git a/src/client_container.proto b/src/client_container.proto
index 4c7ec8d36..c2775c784 100644
--- a/src/client_container.proto
+++ b/src/client_container.proto
@@ -2,7 +2,7 @@
 // adding a new message:
 // within ClientMessage block, 
 //     create a new field in the enum Type section (100s are meant to be normal messages; 1000s are meant to be errors).  It will have new field number X
-//     create a optional message of the same name, and use the same field number X.
+//     create a optional message of the same name (but lower-case!  the json code requires this), and use the same field number X.
 // then at bottom of the file (or wherever; just outside any existing blocks), add your message definition.
 
 package jampb;
@@ -16,11 +16,11 @@ message ClientMessage {
         USER_JOINED_JAM_SESSION = 104;
         LEAVE_JAM_SESSION = 105;
         LEAVE_JAM_SESSION_ACK = 106;
-	HEARTBEAT = 107;
+	      HEARTBEAT = 107;
 
-	TEST_SESSION_MESSAGE = 200;
+	      TEST_SESSION_MESSAGE = 200;
         
-	SERVER_GENERIC_ERROR = 1000;
+	      SERVER_GENERIC_ERROR = 1000;
         SERVER_REJECTION_ERROR = 1001;
     }