diff --git a/ocsmesh/utils.py b/ocsmesh/utils.py
index 3d8cfa21..685fe14a 100644
--- a/ocsmesh/utils.py
+++ b/ocsmesh/utils.py
@@ -2157,6 +2157,8 @@ def raster_from_numpy(
         crs=crs,
         transform=transform,
     ) as dst:
+        if isinstance(data, np.ma.MaskedArray):
+            dst.nodata = data.fill_value
         dst.write(data, 1)