diff --git a/src/core/xmpp.py b/src/core/xmpp.py
index 1ebfd84c..9ee9de5f 100644
--- a/src/core/xmpp.py
+++ b/src/core/xmpp.py
@@ -396,7 +396,7 @@ class SatPresenceProtocol(xmppim.PresenceClientProtocol):
         # if the entity is not known yet in this session or is already unavailable, there is no need to send an unavailable signal
         try:
             presence = self.host.memory.getEntityDatum(entity, "presence", self.parent.profile)
-        except KeyError:
+        except (KeyError, exceptions.UnknownEntityError):
             # the entity has not been seen yet in this session
             pass
         else: