diff --git a/dashboard/src/components/app/Location.vue b/dashboard/src/components/app/Location.vue
index a38c450b1..4064dc66f 100644
--- a/dashboard/src/components/app/Location.vue
+++ b/dashboard/src/components/app/Location.vue
@@ -64,8 +64,16 @@ const formValid = computed(() => {
   }];
 
   for (const d in secondaryDomains.value) checkForDomains.push({ domain: secondaryDomains.value[d].domain, subdomain: secondaryDomains.value[d].subdomain });
-  for (const d of aliases.value) checkForDomains.push({ domain: d.domain, subdomain: d.subdomain });
   for (const d of redirects.value) checkForDomains.push({ domain: d.domain, subdomain: d.subdomain });
+  for (const d of aliases.value) {
+    let subdomain = d.subdomain;
+    // see apps.js:validateLocations()
+    if (d.subdomain.startsWith('*')) {
+      if (subdomain === '*') continue;
+      subdomain = subdomain.replace(/^\*\./, ''); // remove *.
+    }
+    checkForDomains.push({ domain: d.domain, subdomain: subdomain });
+  }
 
   if (checkForDomains.find(d => !isValidDomain((d.subdomain ? (d.subdomain + '.') : '') + d.domain))) return false;