1 files changed, 1 insertions, 1 deletions
diff --git a/std/ws/mod.ts b/std/ws/mod.ts
index 97c77baab..f98e70d92 100644
--- a/std/ws/mod.ts
+++ b/std/ws/mod.ts
@@ -491,7 +491,7 @@ export async function handshake(
     throw new Error("ws: invalid status line: " + statusLine);
   }
 
-  // @ts-expect-error
+  assert(m.groups);
   const { version, statusCode } = m.groups;
   if (version !== "HTTP/1.1" || statusCode !== "101") {
     throw new Error(