diff --git a/packages/web/src/EnterLicensePage.svelte b/packages/web/src/EnterLicensePage.svelte
index 17a7759de..4e86d64e4 100644
--- a/packages/web/src/EnterLicensePage.svelte
+++ b/packages/web/src/EnterLicensePage.svelte
@@ -96,7 +96,7 @@
             value="Purchase DbGate Premium"
             on:click={async e => {
               openWebLink(
-                `https://auth.dbgate.eu/create-checkout-session-simple?source=trial-${isExpired ? 'expired' : trialDaysLeft}`
+                `https://auth.dbgate.eu/create-checkout-session-simple?source=trial-${isExpired ? 'expired' : (trialDaysLeft ?? 'no')}`
               );
             }}
           />