diff --git a/skimage/transform/hough_transform.py b/skimage/transform/hough_transform.py
index 56adcfb2..200aa5dc 100644
--- a/skimage/transform/hough_transform.py
+++ b/skimage/transform/hough_transform.py
@@ -159,6 +159,7 @@ def hough_circle(image, radius, normalize=True, full_output=False):
     >>> try_radii = np.arange(5, 50)
     >>> res = hough_circle(img, try_radii)
     >>> ridx, r, c = np.unravel_index(np.argmax(res), res.shape)
+    >>> r, c, try_radii[ridx]
     (25, 35, 23)
 
     """