diff --git a/src/client.rs b/src/client.rs
index a1a9a7816..39c5765bf 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -1727,6 +1727,11 @@ impl proto::Peer for Peer {
 
         if let Some(status) = pseudo.status {
             b = b.status(status);
+        } else {
+            // Every response must include :status (RFC 9113, section 8.3.2).
+            // https://www.rfc-editor.org/rfc/rfc9113.html#section-8.3.2
+            proto_err!(stream: "missing :status; stream={:?}", stream_id);
+            return Err(Error::library_reset(stream_id, Reason::PROTOCOL_ERROR));
         }
 
         let mut response = match b.body(()) {
diff --git a/tests/h2-tests/tests/client_request.rs b/tests/h2-tests/tests/client_request.rs
index 04f8dddaf..7b8ae7849 100644
--- a/tests/h2-tests/tests/client_request.rs
+++ b/tests/h2-tests/tests/client_request.rs
@@ -820,6 +820,75 @@ async fn sending_request_on_closed_connection() {
     join(srv, h2).await;
 }
 
+#[tokio::test]
+async fn response_missing_status() {
+    h2_support::trace_init!();
+    let (io, mut srv) = mock::new();
+
+    let srv = async move {
+        srv.assert_client_handshake().await;
+        srv.recv_frame(
+            frames::headers(1)
+                .request("GET", "https://example.com/")
+                .eos(),
+        )
+        .await;
+
+        srv.send_frame(frames::headers(1).eos()).await;
+
+        srv.recv_frame(
+            frames::headers(3)
+                .request("GET", "https://example.com/")
+                .eos(),
+        )
+        .await;
+
+        srv.send_frame(frames::headers(3).response(103)).await;
+        srv.send_frame(frames::headers(3).field("server", "test"))
+            .await;
+
+        srv.recv_frame(frames::reset(3).protocol_error()).await;
+        srv.recv_frame(
+            frames::headers(5)
+                .request("GET", "https://example.com/")
+                .eos(),
+        )
+        .await;
+
+        srv.send_frame(frames::headers(5).response(204).eos()).await;
+    };
+
+    let client = async move {
+        let (mut client, mut conn) = client::handshake(io).await.unwrap();
+
+        let request = Request::get("https://example.com/").body(()).unwrap();
+        let (response, _) = client.send_request(request, true).unwrap();
+        let err = conn
+            .drive(response)
+            .await
+            .expect_err("stream 1: empty response without :status");
+        assert!(err.is_reset());
+        assert_eq!(err.reason(), Some(Reason::PROTOCOL_ERROR));
+
+        let request = Request::get("https://example.com/").body(()).unwrap();
+        let (response, _) = client.send_request(request, true).unwrap();
+        let err = conn
+            .drive(response)
+            .await
+            .expect_err("stream 3: final response without :status after 103");
+        assert!(err.is_reset());
+        assert_eq!(err.reason(), Some(Reason::PROTOCOL_ERROR));
+
+        let request = Request::get("https://example.com/").body(()).unwrap();
+        let (response, _) = client.send_request(request, true).unwrap();
+        assert_eq!(conn.drive(response).await.unwrap().status(), 204);
+    };
+
+    tokio::time::timeout(std::time::Duration::from_secs(5), join(srv, client))
+        .await
+        .expect("response_missing_status timed out");
+}
+
 #[tokio::test]
 async fn recv_too_big_headers() {
     h2_support::trace_init!();
diff --git a/tests/h2-tests/tests/stream_states.rs b/tests/h2-tests/tests/stream_states.rs
index 531f39d0a..e302f2328 100644
--- a/tests/h2-tests/tests/stream_states.rs
+++ b/tests/h2-tests/tests/stream_states.rs
@@ -1482,7 +1482,7 @@ async fn srv_window_update_on_lower_stream_id() {
             frames::push_promise(7, 2).request("GET", "https://http2.akamai.com/style.css"),
         )
         .await;
-        srv.send_frame(frames::headers(7).eos()).await;
+        srv.send_frame(frames::headers(7).response(200).eos()).await;
         srv.recv_frame(frames::reset(2).cancel()).await;
         srv.send_frame(frames::window_update(5, 66666)).await;
     };