diff --git a/skimage/segmentation/setup.py b/skimage/segmentation/setup.py
index b6f8d1e2..a197555f 100644
--- a/skimage/segmentation/setup.py
+++ b/skimage/segmentation/setup.py
@@ -11,9 +11,9 @@ def configuration(parent_package='', top_path=None):
 
     config = Configuration('segmentation', parent_package, top_path)
 
-    #cython(['felzenszwalb.pyx'], working_path=base_path)
-    #config.add_extension('felzenszwalb', sources=['felzenszwalb.c'],
-                         #include_dirs=[get_numpy_include_dirs()])
+    cython(['felzenszwalb.pyx'], working_path=base_path)
+    config.add_extension('felzenszwalb', sources=['felzenszwalb.c'],
+                         include_dirs=[get_numpy_include_dirs()])
     cython(['quickshift.pyx'], working_path=base_path)
     config.add_extension('quickshift', sources=['quickshift.c'],
                          include_dirs=[get_numpy_include_dirs()])