diff --git a/openctm/__init__.py b/openctm/__init__.py
index 622ecfe..c7e446b 100644
--- a/openctm/__init__.py
+++ b/openctm/__init__.py
@@ -1 +1 @@
-from .io import import_mesh, export_mesh
+from .io import import_mesh, export_mesh, CTM
diff --git a/openctm/io.py b/openctm/io.py
index a785faa..2b97fe7 100644
--- a/openctm/io.py
+++ b/openctm/io.py
@@ -57,7 +57,7 @@ def export_mesh(_ctm, _filename):
     ctm_context = ctmNewContext(CTM_EXPORT)
     
     if not _filename.lower().endswith('.ctm'):
-		_filename += '.ctm'
+        _filename += '.ctm'
 
     try:
         vertex_count = len(_ctm.vertices)