diff --git a/src/core/scan.ts b/src/core/scan.ts
index e04a70704e..4e5a192619 100644
--- a/src/core/scan.ts
+++ b/src/core/scan.ts
@@ -112,6 +112,11 @@ export async function scanServerRoutes(
 
     route = route.replace(/\/index$/, "") || "/";
 
+    if (/[a-z]+-[a-z]+/.test(route)) {
+      console.warn(
+        `Warning: Route "${route}" contains kebab-case parameters which will return 404.`
+      );
+    }
     return {
       handler: file.fullPath,
       lazy: true,