diff --git a/nipype/interfaces/cmtk/cmtk.py b/nipype/interfaces/cmtk/cmtk.py
index 6622b49ff6..237b092f35 100644
--- a/nipype/interfaces/cmtk/cmtk.py
+++ b/nipype/interfaces/cmtk/cmtk.py
@@ -10,7 +10,6 @@
 
 from ... import logging
 from ...utils.filemanip import split_filename
-from ...utils import NUMPY_MMAP
 
 from ..base import (
     BaseInterface,
diff --git a/nipype/interfaces/dipy/anisotropic_power.py b/nipype/interfaces/dipy/anisotropic_power.py
index 06e25fb132..7ad82fb678 100644
--- a/nipype/interfaces/dipy/anisotropic_power.py
+++ b/nipype/interfaces/dipy/anisotropic_power.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import numpy as np
 import nibabel as nb
 
 from ... import logging
diff --git a/nipype/interfaces/dipy/simulate.py b/nipype/interfaces/dipy/simulate.py
index eb21be1780..e1867342bb 100644
--- a/nipype/interfaces/dipy/simulate.py
+++ b/nipype/interfaces/dipy/simulate.py
@@ -6,7 +6,6 @@
 import nibabel as nb
 
 from ... import logging
-from ...utils import NUMPY_MMAP
 from ..base import (
     traits,
     TraitedSpec,
diff --git a/nipype/interfaces/dipy/tensors.py b/nipype/interfaces/dipy/tensors.py
index e8f2029881..6f77d9a47e 100644
--- a/nipype/interfaces/dipy/tensors.py
+++ b/nipype/interfaces/dipy/tensors.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import numpy as np
 import nibabel as nb
 
 from ... import logging
diff --git a/nipype/interfaces/nipy/model.py b/nipype/interfaces/nipy/model.py
index 887724c4e7..b931947c19 100644
--- a/nipype/interfaces/nipy/model.py
+++ b/nipype/interfaces/nipy/model.py
@@ -1,8 +1,6 @@
 # -*- coding: utf-8 -*-
 import os
 
-from ...utils import NUMPY_MMAP
-
 from .base import NipyBaseInterface
 from ..base import (
     TraitedSpec,
diff --git a/nipype/interfaces/nipy/preprocess.py b/nipype/interfaces/nipy/preprocess.py
index 278147df01..115b7f93ad 100644
--- a/nipype/interfaces/nipy/preprocess.py
+++ b/nipype/interfaces/nipy/preprocess.py
@@ -4,7 +4,6 @@
 import nibabel as nb
 import numpy as np
 
-from ...utils import NUMPY_MMAP
 from ...utils.filemanip import split_filename, fname_presuffix
 
 from .base import NipyBaseInterface, have_nipy
diff --git a/nipype/interfaces/nipy/utils.py b/nipype/interfaces/nipy/utils.py
index 3dafbbc07c..08eb80e0b2 100644
--- a/nipype/interfaces/nipy/utils.py
+++ b/nipype/interfaces/nipy/utils.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 import warnings
+import numpy as np
 import nibabel as nb
 
 from .base import NipyBaseInterface, have_nipy