diff --git a/skimage/filter/__init__.py b/skimage/filter/__init__.py
index 5d43f69d..0763567a 100644
--- a/skimage/filter/__init__.py
+++ b/skimage/filter/__init__.py
@@ -36,7 +36,7 @@ denoise_tv_chambolle = deprecated('skimage.restoration.denoise_tv_chambolle')\
                         (restoration.denoise_tv_chambolle)
 
 # Backward compatibility v<0.11
-@deprecated
+@deprecated()
 def canny(*args, **kwargs):
     # Hack to avoid circular import
     from skimage.feature._canny import canny as canny_
diff --git a/skimage/filters/__init__.py b/skimage/filters/__init__.py
index aeba00f7..edf37ee9 100644
--- a/skimage/filters/__init__.py
+++ b/skimage/filters/__init__.py
@@ -23,7 +23,7 @@ denoise_tv_chambolle = deprecated('skimage.restoration.denoise_tv_chambolle')\
                         (restoration.denoise_tv_chambolle)
 
 # Backward compatibility v<0.11
-@deprecated
+@deprecated()
 def canny(*args, **kwargs):
     # Hack to avoid circular import
     from ..feature._canny import canny as canny_