diff --git a/next-ui/uno.config.ts b/next-ui/uno.config.ts
index 9aaf3094a..b30c48030 100644
--- a/next-ui/uno.config.ts
+++ b/next-ui/uno.config.ts
@@ -4,7 +4,7 @@ import { aliases } from 'vuetify/iconsets/mdi'
 
 // build the safelist from the vuetify icon aliases
 const vuetifyIcons = Object.keys(aliases).map(
-  (key) => `i-mdi:${aliases[key].toString().substring(4)}`,
+  (key) => `i-mdi:${aliases[key]!.toString().substring(4)}`,
 )
 
 export default defineConfig({