diff --git a/aslprep/interfaces/plotting.py b/aslprep/interfaces/plotting.py
index 16fad6287..018b40c31 100644
--- a/aslprep/interfaces/plotting.py
+++ b/aslprep/interfaces/plotting.py
@@ -14,6 +14,8 @@
 from niworkflows.utils.timeseries import _cifti_timeseries, _nifti_timeseries
 from niworkflows.viz.plots import fMRIPlot
 
+from aslprep.utils.plotting import CBFPlot, CBFtsPlot
+
 
 class _ASLSummaryInputSpec(BaseInterfaceInputSpec):
     in_nifti = File(exists=True, mandatory=True, desc="input BOLD (4D NIfTI file)")