diff --git a/packages/next/server/config-schema.ts b/packages/next/server/config-schema.ts
index ba1128cf18b3a67..14624f761d3e578 100644
--- a/packages/next/server/config-schema.ts
+++ b/packages/next/server/config-schema.ts
@@ -572,7 +572,6 @@ const configSchema = {
                 type: 'string',
               },
               port: {
-                minLength: 1,
                 type: 'string',
               },
               protocol: {