diff --git a/telegram/utils.go b/telegram/utils.go
index 48e4b5c..82486f5 100644
--- a/telegram/utils.go
+++ b/telegram/utils.go
@@ -1273,7 +1273,9 @@ func (c *Client) ProcessIncomingMessage(chatId int64, message *client.Message) {
 
 				if text != "" {
 					if prefix != "" {
-						newText.WriteString(c.getPrefixSeparator(chatId))
+						separator := c.getPrefixSeparator(chatId)
+						newText.WriteString(separator)
+						reply.End += uint64(len(separator))
 					}
 					newText.WriteString(text)
 				}