diff --git a/skimage/transform/project.py b/skimage/transform/project.py
index b786c4a7..030e86a9 100644
--- a/skimage/transform/project.py
+++ b/skimage/transform/project.py
@@ -4,7 +4,7 @@
 
 import numpy as np
 from scipy.ndimage import interpolation as ndii
-from .warp import _stackcopy
+from ._warp import _stackcopy
 
 __all__ = ['homography']