diff --git a/irclog.py b/irclog.py
index b203585..dffaff4 100644
--- a/irclog.py
+++ b/irclog.py
@@ -1234,6 +1234,13 @@ async def main():
 		storage.update_config(config)
 	loop.add_signal_handler(signal.SIGUSR1, sigusr1_callback)
 
+	def sigusr2_callback():
+		nonlocal storage
+		logger.info('Got SIGUSR2, forcing log flush')
+		for channel in storage.files:
+			storage.files[channel][2] = time.time()
+	loop.add_signal_handler(signal.SIGUSR2, sigusr2_callback)
+
 	await asyncio.gather(irc.run(loop, sigintEvent), webserver.run(sigintEvent), storage.run(loop, sigintEvent))