diff --git a/packages/trace-viewer/src/ui/annotationsTab.tsx b/packages/trace-viewer/src/ui/annotationsTab.tsx
index b8438df7de..5a2a34c9f1 100644
--- a/packages/trace-viewer/src/ui/annotationsTab.tsx
+++ b/packages/trace-viewer/src/ui/annotationsTab.tsx
@@ -22,10 +22,10 @@ import { linkifyText } from '@web/renderUtils';
 type Annotation = { type: string; description?: string; };
 
 export const AnnotationsTab: React.FunctionComponent<{
-  annotations: Annotation[] | undefined,
+  annotations: Annotation[],
 }> = ({ annotations }) => {
 
-  if (!annotations || !annotations.length)
+  if (!annotations.length)
     return <PlaceholderPanel text='No annotations' />;
 
   return <div className='annotations-tab'>
diff --git a/packages/trace-viewer/src/ui/workbench.tsx b/packages/trace-viewer/src/ui/workbench.tsx
index e94617925b..0a5dd226eb 100644
--- a/packages/trace-viewer/src/ui/workbench.tsx
+++ b/packages/trace-viewer/src/ui/workbench.tsx
@@ -230,7 +230,7 @@ export const Workbench: React.FunctionComponent<{
     const annotationsTab: TabbedPaneTabModel = {
       id: 'annotations',
       title: 'Annotations',
-      count: annotations?.length ?? 0,
+      count: annotations.length,
       render: () => <AnnotationsTab annotations={annotations} />
     };
     tabs.push(annotationsTab);