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-rw-r--r--src/tabs.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tabs.py b/src/tabs.py
index 1cec7b28..74dc468d 100644
--- a/src/tabs.py
+++ b/src/tabs.py
@@ -605,7 +605,7 @@ class MucTab(ChatTab):
def on_gain_focus(self):
self._room.set_color_state(theme.COLOR_TAB_CURRENT)
- if self.text_win.built_lines[-1] is None:
+ if self.text_win.built_lines and self.text_win.built_lines[-1] is None:
self.text_win.remove_line_separator()
curses.curs_set(1)