diff --git a/aslprep/workflows/asl/base.py b/aslprep/workflows/asl/base.py
index 8d3a7aa87..16d18b336 100644
--- a/aslprep/workflows/asl/base.py
+++ b/aslprep/workflows/asl/base.py
@@ -614,7 +614,9 @@ def init_asl_preproc_wf(asl_file, has_fieldmap=False):
     # Map final ASL mask into T1w space (if required)
     nonstd_spaces = set(spaces.get_nonstandard())
     if nonstd_spaces.intersection(("T1w", "anat")):
-        from niworkflows.interfaces.fixes import FixHeaderApplyTransforms as ApplyTransforms
+        from niworkflows.interfaces.fixes import (
+            FixHeaderApplyTransforms as ApplyTransforms,
+        )
 
         aslmask_to_t1w = pe.Node(
             ApplyTransforms(interpolation="MultiLabel"),
diff --git a/aslprep/workflows/asl/registration.py b/aslprep/workflows/asl/registration.py
index 5d5bbc777..b2ccfd988 100644
--- a/aslprep/workflows/asl/registration.py
+++ b/aslprep/workflows/asl/registration.py
@@ -247,6 +247,7 @@ def init_asl_t1_trans_wf(
       * :py:func:`~aslprep.workflows.asl.registration.init_fsl_bbr_wf`
 
     """
+    from fmriprep.interfaces.maths import Clip
     from niworkflows.engine.workflows import LiterateWorkflow as Workflow
     from niworkflows.func.util import init_bold_reference_wf
     from niworkflows.interfaces.fixes import FixHeaderApplyTransforms as ApplyTransforms
@@ -254,8 +255,6 @@ def init_asl_t1_trans_wf(
     from niworkflows.interfaces.nibabel import GenerateSamplingReference
     from niworkflows.interfaces.nilearn import Merge
 
-    from fmriprep.interfaces.maths import Clip
-
     workflow = Workflow(name=name)
 
     inputnode = pe.Node(