diff --git a/src/panels/Fahrplan/FahrplanPanel.tsx b/src/panels/Fahrplan/FahrplanPanel.tsx
index dfdf3d7ad392a71d52a91940373f0b1c22d88180..fc9b7a177e8b0c5f09dd3e844544c73bc34e809d 100644
--- a/src/panels/Fahrplan/FahrplanPanel.tsx
+++ b/src/panels/Fahrplan/FahrplanPanel.tsx
@@ -161,7 +161,7 @@ function stringToDelay(input: string): number | undefined {
   if(delay === 0) {
     return undefined;
   }
-  if(delay === Number.NaN) {
+  if(isNaN(delay)) {
     console.warn("While parsing delay, the string was not interpretable as number", input);
     return undefined;
   }