diff --git a/.changeset/little-lobsters-decide.md b/.changeset/little-lobsters-decide.md
new file mode 100644
index 00000000000..d8963bc7847
--- /dev/null
+++ b/.changeset/little-lobsters-decide.md
@@ -0,0 +1,6 @@
+---
+"remix": patch
+"@remix-run/dev": patch
+---
+
+don't allow `*` to be anywhere in flat route segment
diff --git a/packages/remix-dev/__tests__/flat-routes-test.ts b/packages/remix-dev/__tests__/flat-routes-test.ts
index 5b9bb523a85..989e7dd3a21 100644
--- a/packages/remix-dev/__tests__/flat-routes-test.ts
+++ b/packages/remix-dev/__tests__/flat-routes-test.ts
@@ -109,6 +109,7 @@ describe("flatRoutes", () => {
     let invalidSplatFiles: string[] = [
       "routes/about.[*].tsx",
       "routes/about.*.tsx",
+      "routes/about.[.[.*].].tsx",
     ];
 
     for (let invalid of invalidSplatFiles) {
@@ -369,14 +370,6 @@ describe("flatRoutes", () => {
           path: ".",
         },
       ],
-      [
-        "routes/about.[.[.*].].tsx",
-        {
-          id: "routes/about.[.[.*].]",
-          parentId: "routes/about",
-          path: ".[.*/]",
-        },
-      ],
 
       // Optional route segments
       [
diff --git a/packages/remix-dev/config/flat-routes.ts b/packages/remix-dev/config/flat-routes.ts
index c0b83821d43..7312d3c6624 100644
--- a/packages/remix-dev/config/flat-routes.ts
+++ b/packages/remix-dev/config/flat-routes.ts
@@ -133,7 +133,7 @@ export function getRouteSegments(routeId: string) {
       );
     };
 
-    if (rawRouteSegment === "*") {
+    if (rawRouteSegment.includes("*")) {
       return notSupportedInRR(rawRouteSegment, "*");
     }