diff --git a/app/widget/viewer/viewer.cpp b/app/widget/viewer/viewer.cpp
index 32d1a5bd9..b84d0dec2 100644
--- a/app/widget/viewer/viewer.cpp
+++ b/app/widget/viewer/viewer.cpp
@@ -619,7 +619,9 @@ void ViewerWidget::SaveFrameAsImage()
 
 void ViewerWidget::DetectMulticamNodeNow()
 {
-  DetectMulticamNode(GetConnectedNode()->GetPlayhead());
+  if (GetConnectedNode()) {
+    DetectMulticamNode(GetConnectedNode()->GetPlayhead());
+  }
 }
 
 void ViewerWidget::CloseAudioProcessor()