diff --git a/gunpowder/nodes/snapshot.py b/gunpowder/nodes/snapshot.py
index acc3f624..10405dbc 100644
--- a/gunpowder/nodes/snapshot.py
+++ b/gunpowder/nodes/snapshot.py
@@ -207,7 +207,7 @@ def process(self, batch, request):
                     if not array.spec.nonspatial:
                         if array.spec.roi is not None:
                             dataset.attrs["offset"] = array.spec.roi.offset
-                        dataset.attrs["resolution"] = self.spec[array_key].voxel_size
+                        dataset.attrs["voxel_size"] = self.spec[array_key].voxel_size
 
                     if self.store_value_range:
                         dataset.attrs["value_range"] = (