diff --git a/src/conversation_textview.py b/src/conversation_textview.py
index 146b5d393..f371ca308 100644
--- a/src/conversation_textview.py
+++ b/src/conversation_textview.py
@@ -1095,6 +1095,8 @@ class ConversationTextview(GObject.GObject):
             special_text = otext[start:end]
             if start > index:
                 text_before_special_text = otext[index:start]
+                if not iter_:
+                    end_iter = buffer_.get_end_iter()
                 # we insert normal text
                 if other_tags:
                     insert_tags_func(end_iter, text_before_special_text, *other_tags)