diff --git a/src/event/call-event.cpp b/src/event/call-event.cpp
index bc17b4e2c..f6eee2b1e 100644
--- a/src/event/call-event.cpp
+++ b/src/event/call-event.cpp
@@ -36,6 +36,7 @@ public:
 CallEvent::CallEvent (Type type, const shared_ptr<Call> &call) : Event(*new CallEventPrivate, type) {
 	L_D(CallEvent);
 	L_ASSERT(call);
+	L_ASSERT(type == CallStartEvent || type == CallEndEvent);
 	d->call = call;
 }
 
diff --git a/src/event/conference-event.cpp b/src/event/conference-event.cpp
index 9cd2e9d11..9fb000415 100644
--- a/src/event/conference-event.cpp
+++ b/src/event/conference-event.cpp
@@ -35,6 +35,7 @@ public:
 
 ConferenceEvent::ConferenceEvent (Type type, const shared_ptr<Address> &address) : Event(*new ConferenceEventPrivate, type) {
 	L_D(ConferenceEvent);
+	L_ASSERT(type == ConferenceCreatedEvent || type == ConferenceDestroyedEvent);
 	L_ASSERT(address);
 	d->address = address;
 }