diff --git a/packages/trace-viewer/src/ui/networkResourceDetails.tsx b/packages/trace-viewer/src/ui/networkResourceDetails.tsx
index bfbeacd57b..c5a974b69e 100644
--- a/packages/trace-viewer/src/ui/networkResourceDetails.tsx
+++ b/packages/trace-viewer/src/ui/networkResourceDetails.tsx
@@ -69,6 +69,8 @@ const RequestTab: React.FunctionComponent<{
         } else {
           setRequestBody({ text: formatBody(resource.request.postData.text, requestContentType), language });
         }
+      } else {
+        setRequestBody(null);
       }
     };
     readResources();