diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index a7a188452..649110267 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -2390,6 +2390,7 @@ def _make_environment_for_app_script(
         "YNH_APP_INSTANCE_NAME": app,
         "YNH_APP_INSTANCE_NUMBER": str(app_instance_nb),
         "YNH_APP_MANIFEST_VERSION": manifest.get("version", "?"),
+        "YNH_ARCH": check_output("dpkg --print-architecture"),
     }
 
     if workdir: