diff --git a/src/darsia/corrections/shape/curvature.py b/src/darsia/corrections/shape/curvature.py
index 2d52d73c..4373d544 100644
--- a/src/darsia/corrections/shape/curvature.py
+++ b/src/darsia/corrections/shape/curvature.py
@@ -779,8 +779,13 @@ def _transform_image(
             im_array_as_vector = map_coordinates(
                 in_data, grid, order=self.interpolation_order
             )
-            # Convert to correct shape and data type
-            corrected_img[:, :, i] = im_array_as_vector.reshape(shape).astype(img.dtype)
+            # Convert to correct shape and data type (if necessary)
+            if im_array_as_vector.dtype == img.dtype:
+                corrected_img[:, :, i] = im_array_as_vector.reshape(shape)
+            else:
+                corrected_img[:, :, i] = im_array_as_vector.reshape(shape).astype(
+                    img.dtype
+                )
 
         return np.squeeze(corrected_img)