diff --git a/skimage/measure/setup.py b/skimage/measure/setup.py
index 19d69429..be57ca7b 100644
--- a/skimage/measure/setup.py
+++ b/skimage/measure/setup.py
@@ -20,7 +20,8 @@ def configuration(parent_package='', top_path=None):
                          include_dirs=[get_numpy_include_dirs()])
     config.add_extension('_moments', sources=['_moments.c'],
                          include_dirs=[get_numpy_include_dirs()])
-    config.add_extension('_marching_cubes_cy', sources=['_marching_cubes.c'],
+    config.add_extension('_marching_cubes_cy',
+                         sources=['_marching_cubes_cy.c'],
                          include_dirs=[get_numpy_include_dirs()])
 
     return config