diff --git a/nimare/meta/kernel.py b/nimare/meta/kernel.py
index 837c04167..2b520b005 100644
--- a/nimare/meta/kernel.py
+++ b/nimare/meta/kernel.py
@@ -184,7 +184,7 @@ def transform(self, dataset, masker=None, return_type="image"):
                 imgs.append(img)
             elif return_type == "image":
                 kernel_data *= mask_data
-                img = nib.Nifti1Image(kernel_data, mask.affine)
+                img = nib.Nifti1Image(kernel_data, mask.affine, dtype=kernel_data.dtype)
                 imgs.append(img)
 
         del kernel_data, transformed_maps