diff --git a/skimage/_shared/_warnings.py b/skimage/_shared/_warnings.py
index a5fdd4cb..78d38fbd 100644
--- a/skimage/_shared/_warnings.py
+++ b/skimage/_shared/_warnings.py
@@ -78,7 +78,7 @@ def expected_warnings(matching):
     --------
     >>> from skimage import data, img_as_ubyte, img_as_float
     >>> with expected_warnings(['precision loss']):
-    ...   d = img_as_ubyte(img_as_float(data.coins()))
+    ...     d = img_as_ubyte(img_as_float(data.coins()))
 
     Notes
     -----