diff --git a/skimage/morphology/greyreconstruct.py b/skimage/morphology/greyreconstruct.py
index 049488f8..17455b55 100644
--- a/skimage/morphology/greyreconstruct.py
+++ b/skimage/morphology/greyreconstruct.py
@@ -159,7 +159,7 @@ def reconstruction(seed, mask, method='dilation', selem=None, offset=None):
     # Create a list of strides across the array to get the neighbors within
     # a flattened array
     value_stride = np.array(images.strides[1:]) / images.dtype.itemsize
-    image_stride = images.strides[0] / images.dtype.itemsize
+    image_stride = images.strides[0] // images.dtype.itemsize
     selem_mgrid = np.mgrid[[slice(-o, d - o)
                             for d, o in zip(selem.shape, offset)]]
     selem_offsets = selem_mgrid[:, selem].transpose()