diff --git a/.chronus/changes/witemple-msft-hsj-router-param-bug-2024-7-7-15-20-46.md b/.chronus/changes/witemple-msft-hsj-router-param-bug-2024-7-7-15-20-46.md
new file mode 100644
index 00000000000..e6b2d73577f
--- /dev/null
+++ b/.chronus/changes/witemple-msft-hsj-router-param-bug-2024-7-7-15-20-46.md
@@ -0,0 +1,8 @@
+---
+changeKind: fix
+packages:
+  - typespec-vs
+  - "@typespec/http-server-javascript"
+---
+
+Fixed a router bug where paths would sometimes fail to match after a parameter was bound.
\ No newline at end of file
diff --git a/packages/http-server-javascript/src/http/server/router.ts b/packages/http-server-javascript/src/http/server/router.ts
index 6fa8b92e767..e0ce6923801 100644
--- a/packages/http-server-javascript/src/http/server/router.ts
+++ b/packages/http-server-javascript/src/http/server/router.ts
@@ -248,8 +248,11 @@ function* emitRouteHandler(
 
     yield `else {`;
     const paramName = parameters.length === 1 ? parameters[0] : "param";
-    yield `  const [${paramName}, rest] = path.split("/", 1);`;
-    yield `  path = rest ?? "";`;
+    const idxName = `__${parseCase(paramName).snakeCase}_idx`;
+    yield `  let ${idxName} = path.indexOf("/");`;
+    yield `  ${idxName} = ${idxName} === -1 ? path.length : ${idxName};`;
+    yield `  const ${paramName} = path.slice(0, ${idxName});`;
+    yield `  path = path.slice(${idxName});`;
     if (parameters.length !== 1) {
       for (const p of parameters) {
         yield `  const ${parseCase(p).camelCase} = param;`;