diff --git a/doc/api/webstreams.md b/doc/api/webstreams.md
index 03f95b87ff0b3c..3d0ba237fe7fea 100644
--- a/doc/api/webstreams.md
+++ b/doc/api/webstreams.md
@@ -1420,9 +1420,13 @@ changes:
 
 <!-- YAML
 added: v17.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50097
+    description: format now accepts `deflate-raw` value.
 -->
 
-* `format` {string} One of either `'deflate'` or `'gzip'`.
+* `format` {string} One of `'deflate'`, `'deflate-raw'`, or `'gzip'`.
 
 #### `compressionStream.readable`
 
@@ -1454,9 +1458,13 @@ changes:
 
 <!-- YAML
 added: v17.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50097
+    description: format now accepts `deflate-raw` value.
 -->
 
-* `format` {string} One of either `'deflate'` or `'gzip'`.
+* `format` {string} One of `'deflate'`, `'deflate-raw'`, or `'gzip'`.
 
 #### `decompressionStream.readable`
 
diff --git a/lib/internal/webstreams/compression.js b/lib/internal/webstreams/compression.js
index 6cbaa3f3250e73..d912959e29fd23 100644
--- a/lib/internal/webstreams/compression.js
+++ b/lib/internal/webstreams/compression.js
@@ -35,13 +35,16 @@ class CompressionStream {
   #transform;
 
   /**
-   * @param {'deflate'|'gzip'} format
+   * @param {'deflate'|'deflate-raw'|'gzip'} format
    */
   constructor(format) {
     switch (format) {
       case 'deflate':
         this.#handle = lazyZlib().createDeflate();
         break;
+      case 'deflate-raw':
+        this.#handle = lazyZlib().createDeflateRaw();
+        break;
       case 'gzip':
         this.#handle = lazyZlib().createGzip();
         break;
@@ -80,13 +83,16 @@ class DecompressionStream {
   #transform;
 
   /**
-   * @param {'deflate'|'gzip'} format
+   * @param {'deflate'|'deflate-raw'|'gzip'} format
    */
   constructor(format) {
     switch (format) {
       case 'deflate':
         this.#handle = lazyZlib().createInflate();
         break;
+      case 'deflate-raw':
+        this.#handle = lazyZlib().createInflateRaw();
+        break;
       case 'gzip':
         this.#handle = lazyZlib().createGunzip();
         break;
diff --git a/test/parallel/test-whatwg-webstreams-compression.js b/test/parallel/test-whatwg-webstreams-compression.js
index c527fc1f13d10e..fb20801543bff6 100644
--- a/test/parallel/test-whatwg-webstreams-compression.js
+++ b/test/parallel/test-whatwg-webstreams-compression.js
@@ -38,7 +38,7 @@ async function test(format) {
   ]);
 }
 
-Promise.all(['gzip', 'deflate'].map((i) => test(i))).then(common.mustCall());
+Promise.all(['gzip', 'deflate', 'deflate-raw'].map((i) => test(i))).then(common.mustCall());
 
 [1, 'hello', false, {}].forEach((i) => {
   assert.throws(() => new CompressionStream(i), {