diff --git a/core/group_chat.go b/core/group_chat.go
index e50abd2..094b061 100644
--- a/core/group_chat.go
+++ b/core/group_chat.go
@@ -163,7 +163,7 @@ func (gc *groupChat) EnterPublicChannel(ctx wshandler.ApiCallContext) {
 					Tag:    []string{"ChattingChannelProperties"},
 				})
 			} else {
-				logger.Println("JSONSet $.members failed :", chanid, err)
+				logger.Println("JSONSet $.members failed :", chanid, *ctx.CallBy, err)
 				logger.Println(gc.rh.JSONGet(chanid, "$"))
 			}
 		} else {