--- a/setup.py	Mon Jul 18 16:25:14 2016 +0200
+++ b/setup.py	Mon Jul 18 19:02:30 2016 +0200
@@ -561,7 +561,8 @@
               depends=common_depends + ['mercurial/bdiff.h']),
     Extension('mercurial.diffhelpers', ['mercurial/diffhelpers.c'],
               depends=common_depends),
-    Extension('mercurial.mpatch', ['mercurial/mpatch.c'],
+    Extension('mercurial.mpatch', ['mercurial/mpatch.c',
+                                   'mercurial/mpatch_module.c'],
               depends=common_depends),
     Extension('mercurial.parsers', ['mercurial/dirs.c',
                                     'mercurial/manifest.c',