diff --git a/dispatcher/backend/src/common/schemas/offliners/zimit.py b/dispatcher/backend/src/common/schemas/offliners/zimit.py
index de1bcbf1..fa723a89 100644
--- a/dispatcher/backend/src/common/schemas/offliners/zimit.py
+++ b/dispatcher/backend/src/common/schemas/offliners/zimit.py
@@ -1,11 +1,10 @@
-from marshmallow import fields, validate
-
 from common.schemas import SerializableSchema, String, StringEnum
 from common.schemas.fields import (
     validate_output,
     validate_zim_description,
     validate_zim_filename,
 )
+from marshmallow import fields, validate
 
 # https://github.com/puppeteer/puppeteer/blob/main/src/common/DeviceDescriptors.ts
 # https://github.com/puppeteer/puppeteer/blob/
@@ -334,6 +333,18 @@ class Meta:
         validate=validate_devicelist,
     )
 
+    no_mobile_device = fields.Boolean(
+        truthy=[True],
+        falsy=[False],
+        metadata={
+            "label": "No device",
+            "description": "Do not emulate a device (use at your own risk, behavior is "
+            "uncertain ; if set, 'As device' setting is ignored)",
+        },
+        data_key="noMobileDevice",
+        required=False,
+    )
+
     user_agent = String(
         metadata={
             "label": "User Agent",