diff --git a/src/pipeline.cc b/src/pipeline.cc
index 23988535..cc38cef7 100644
--- a/src/pipeline.cc
+++ b/src/pipeline.cc
@@ -72,7 +72,9 @@ class PipelineWorker : public Napi::AsyncWorker {
       int nPages = baton->input->pages;
       if (nPages == -1) {
         // Resolve the number of pages if we need to render until the end of the document
-        nPages = image.get_typeof(VIPS_META_N_PAGES) != 0 ? image.get_int(VIPS_META_N_PAGES) : 1;
+        nPages = image.get_typeof(VIPS_META_N_PAGES) != 0
+          ? image.get_int(VIPS_META_N_PAGES) - baton->input->page
+          : 1;
       }
 
       // Get pre-resize page height
diff --git a/test/unit/webp.js b/test/unit/webp.js
index 3e122e8b..f87f3caf 100644
--- a/test/unit/webp.js
+++ b/test/unit/webp.js
@@ -217,4 +217,15 @@ describe('WebP', function () {
     assert.strictEqual(updated.height, 570 * 9);
     assert.strictEqual(updated.pageHeight, 570);
   });
+
+  it('should take page parameter into account when animated is set', async () => {
+    const updated = await sharp(fixtures.inputWebPAnimated, { animated: true, page: 2 })
+      .resize({ height: 570 })
+      .webp({ effort: 0 })
+      .toBuffer()
+      .then(data => sharp(data, { pages: -1 }).metadata());
+
+    assert.strictEqual(updated.height, 570 * 7);
+    assert.strictEqual(updated.pageHeight, 570);
+  });
 });