diff --git a/tmtcc.py b/tmtcc.py
index 62f000c..da1ed2d 100755
--- a/tmtcc.py
+++ b/tmtcc.py
@@ -178,8 +178,8 @@ class PusHandler(SpecificApidHandlerBase):
 
 
 class UnknownApidHandler(GenericApidHandlerBase):
-    def handle_tm(self, apid: int, _packet: bytes, _user_args: any):
-        _LOGGER.warning(f"Packet with unknwon APID {apid} detected")
+    def handle_tm(self, apid: int, packet: bytes, _user_args: any):
+        _LOGGER.warning(f"Packet with unknwon APID {apid} detected: {packet}")
 
 
 class CfdpInCcsdsWrapper(SpecificApidHandlerBase):