diff --git a/aprsd/threads/rx.py b/aprsd/threads/rx.py
index b28dbff..0309955 100644
--- a/aprsd/threads/rx.py
+++ b/aprsd/threads/rx.py
@@ -115,7 +115,7 @@ class APRSDProcessPacketThread(APRSDThread):
             )
 
             # Only ack messages that were sent directly to us
-            if tocall == self.config["aprsd"]["callsign"]:
+            if (tocall.lower() == self.config["aprsd"]["callsign"].lower()):
                 stats.APRSDStats().msgs_rx_inc()
                 # let any threads do their thing, then ack
                 # send an ack last