diff --git a/setup.py b/setup.py
index 6d4b2bc172f..919bc64cca5 100644
--- a/setup.py
+++ b/setup.py
@@ -76,6 +76,7 @@ class PyBuildExt(build_ext):
             ext.sources = [ os.path.join(moddir, filename)
                             for filename in ext.sources ]
             ext.include_dirs.append( '.' ) # to get config.h
+            ext.include_dirs.append( os.path.join(srcdir, './Include') )
 
             # Try importing a module; if it's already been built statically,
             # don't build it here