diff --git a/lib/internal/quic/quic.js b/lib/internal/quic/quic.js
index 633e1f4e4de..1ca8ee2b27f 100644
--- a/lib/internal/quic/quic.js
+++ b/lib/internal/quic/quic.js
@@ -2133,25 +2133,6 @@ class QuicStream {
     this[kFinishClose](error); // A no-op, unless destroy() failed
   }
 
-  /**
-   * Sets the outbound data source for the stream. This can only be called
-   * once and must be called before any data will be sent. The body can be
-   * an ArrayBuffer, a TypedArray or DataView, or a Blob. If the stream
-   * is destroyed or already has an outbound data source, an error will
-   * be thrown.
-   * @param {ArrayBuffer|SharedArrayBuffer|ArrayBufferView|Blob} outbound
-   */
-  setOutbound(outbound) {
-    assertIsQuicStream(this);
-    if (this.destroyed) {
-      throw new ERR_INVALID_STATE('Stream is destroyed');
-    }
-    if (this.#inner.state.hasOutbound) {
-      throw new ERR_INVALID_STATE('Stream already has an outbound data source');
-    }
-    this.#handle.attachSource(validateBody(outbound));
-  }
-
   /**
    * @param {object} headers
    * @param {SendHeadersOptions} [options]