diff --git a/skimage/morphology/cmorph.pyx b/skimage/morphology/cmorph.pyx
index 2e0fa88a..070c881b 100644
--- a/skimage/morphology/cmorph.pyx
+++ b/skimage/morphology/cmorph.pyx
@@ -9,9 +9,9 @@ from libc.stdlib cimport malloc, free
 
 
 def _dilate(np.ndarray[np.uint8_t, ndim=2] image,
-           np.ndarray[np.uint8_t, ndim=2] selem,
-           np.ndarray[np.uint8_t, ndim=2] out=None,
-           char shift_x=0, char shift_y=0):
+            np.ndarray[np.uint8_t, ndim=2] selem,
+            np.ndarray[np.uint8_t, ndim=2] out=None,
+            char shift_x=0, char shift_y=0):
     """Return greyscale morphological erosion of an image.
 
     Morphological erosion sets a pixel at (i,j) to the minimum over all pixels
@@ -87,9 +87,9 @@ def _dilate(np.ndarray[np.uint8_t, ndim=2] image,
 
 
 def _erode(np.ndarray[np.uint8_t, ndim=2] image,
-          np.ndarray[np.uint8_t, ndim=2] selem,
-          np.ndarray[np.uint8_t, ndim=2] out=None,
-          char shift_x=0, char shift_y=0):
+           np.ndarray[np.uint8_t, ndim=2] selem,
+           np.ndarray[np.uint8_t, ndim=2] out=None,
+           char shift_x=0, char shift_y=0):
     """Return greyscale morphological dilation of an image.
 
     Morphological dilation sets a pixel at (i,j) to the maximum over all pixels
diff --git a/skimage/morphology/grey.py b/skimage/morphology/grey.py
index 233bca4a..ef7158b2 100644
--- a/skimage/morphology/grey.py
+++ b/skimage/morphology/grey.py
@@ -59,7 +59,7 @@ def erosion(image, selem, out=None, shift_x=False, shift_y=False):
     image = img_as_ubyte(image)
     selem = img_as_ubyte(selem)
     return cmorph._erode(image, selem, out=out,
-                        shift_x=shift_x, shift_y=shift_y)
+                         shift_x=shift_x, shift_y=shift_y)
 
 
 def dilation(image, selem, out=None, shift_x=False, shift_y=False):
@@ -112,7 +112,7 @@ def dilation(image, selem, out=None, shift_x=False, shift_y=False):
     image = img_as_ubyte(image)
     selem = img_as_ubyte(selem)
     return cmorph._dilate(image, selem, out=out,
-                         shift_x=shift_x, shift_y=shift_y)
+                          shift_x=shift_x, shift_y=shift_y)
 
 
 def opening(image, selem, out=None):