diff --git a/io_scene_ms3d/__init__.py b/io_scene_ms3d/__init__.py
index c70c20b5fc09b4e0ad2ca2f4ae0333ab50a65357..00363f1098c9c7f9db6aed1dfef19c65f01d8425 100644
--- a/io_scene_ms3d/__init__.py
+++ b/io_scene_ms3d/__init__.py
@@ -23,7 +23,7 @@ bl_info = {
     'description': "Import / Export MilkShape3D MS3D files"\
             " (conform with MilkShape3D v1.8.4)",
     'author': "Alexander Nussbaumer",
-    'version': (0, 99, 0),
+    'version': (0, 99, 1),
     'blender': (2, 66, 0),
     'location': "File > Import & File > Export",
     'warning': "",
diff --git a/io_scene_ms3d/ms3d_ui.py b/io_scene_ms3d/ms3d_ui.py
index 70a79008b9c8492261a3b10a035728fe23fd1fc0..5a3431c14743dcaa240833cf4e117771d2c59fdd 100644
--- a/io_scene_ms3d/ms3d_ui.py
+++ b/io_scene_ms3d/ms3d_ui.py
@@ -147,7 +147,8 @@ class Ms3dUi:
             return Ms3dUi.MODE_TRANSPARENCY_DEPTH_BUFFERED_WITH_ALPHA_REF
         elif(ms3d_value == Ms3dSpec.MODE_TRANSPARENCY_DEPTH_SORTED_TRIANGLES):
             return Ms3dUi.MODE_TRANSPARENCY_DEPTH_SORTED_TRIANGLES
-        return None
+
+        return Ms3dUi.MODE_TRANSPARENCY_SIMPLE
 
     @staticmethod
     def transparency_mode_to_ms3d(ui_value):
@@ -157,7 +158,8 @@ class Ms3dUi:
             return Ms3dSpec.MODE_TRANSPARENCY_DEPTH_BUFFERED_WITH_ALPHA_REF
         elif(ui_value == Ms3dUi.MODE_TRANSPARENCY_DEPTH_SORTED_TRIANGLES):
             return Ms3dSpec.MODE_TRANSPARENCY_DEPTH_SORTED_TRIANGLES
-        return None
+
+        return Ms3dSpec.MODE_TRANSPARENCY_SIMPLE
 
 
     FLAG_NONE = 'NONE'