diff --git a/atlas_densities/densities/mtype_densities_from_map/create.py b/atlas_densities/densities/mtype_densities_from_map/create.py
index a260398..9995c0b 100644
--- a/atlas_densities/densities/mtype_densities_from_map/create.py
+++ b/atlas_densities/densities/mtype_densities_from_map/create.py
@@ -125,7 +125,7 @@ def _create_densities_for_metype(metype: str) -> Optional[Tuple[str, str]]:
                 density = annotation_index.ravel(molecular_type_densities[molecular_type])
                 metype_density[region_indices] += density[region_indices] * coefficient
 
-        # reshape the 1d metype_density array  ack to the annotation's shape
+        # reshape the 1d metype_density array back to the annotation's shape
         metype_density = annotation_index.unravel(metype_density)
 
         if np.any(metype_density):