diff --git a/linphone-desktop/src/components/call/CallModel.cpp b/linphone-desktop/src/components/call/CallModel.cpp
index 4496b7120..6c5581f1e 100644
--- a/linphone-desktop/src/components/call/CallModel.cpp
+++ b/linphone-desktop/src/components/call/CallModel.cpp
@@ -35,6 +35,7 @@
 // =============================================================================
 
 CallModel::CallModel (shared_ptr<linphone::Call> linphone_call) {
+  Q_ASSERT(linphone_call != nullptr);
   m_linphone_call = linphone_call;
 
   // Deal with auto-answer.