diff --git a/cfgrib/xarray_to_grib.py b/cfgrib/xarray_to_grib.py
index 06e6554..5cdccc1 100644
--- a/cfgrib/xarray_to_grib.py
+++ b/cfgrib/xarray_to_grib.py
@@ -253,7 +253,11 @@ def canonical_dataset_to_grib(dataset, path, mode="wb", no_warn=False, grib_keys
 
     # validate Dataset keys, DataArray names, and attr keys/values
     xr.backends.api._validate_dataset_names(dataset)  # type: ignore
-    xr.backends.api._validate_attrs(dataset)  # type: ignore
+    # _validate_attrs takes the engine name as its 2nd arg from xarray 2024.09.0
+    try:
+        xr.backends.api._validate_attrs(dataset)  # type: ignore
+    except TypeError:
+        xr.backends.api._validate_attrs(dataset, "cfgrib")  # type: ignore
 
     real_grib_keys = {str(k)[5:]: v for k, v in dataset.attrs.items() if str(k)[:5] == "GRIB_"}
     real_grib_keys.update(grib_keys)