diff --git a/skimage/transform/hough_transform.py b/skimage/transform/hough_transform.py
index e83cecd5..8abcfa32 100644
--- a/skimage/transform/hough_transform.py
+++ b/skimage/transform/hough_transform.py
@@ -100,6 +100,9 @@ from skimage._shared.utils import deprecated
 
 @deprecated('hough_line')
 def hough(img, theta=None):
+    """
+    This function is deprecated. Use `hough_line` instead.
+    """
     return hough_line(img, theta)
 
 from ._hough_transform import _hough_circle