diff --git a/export_geo.py b/export_geo.py
index 3ba7f06..20b3067 100644
--- a/export_geo.py
+++ b/export_geo.py
@@ -160,7 +160,7 @@ def save(operator, context, scale = 1.0, filepath = "", global_matrix = None, us
         else:
             mesh.transform(global_matrix @ scale_matrix @ translate_matrix @ axis_rotation)
 
-        mesh.calc_normals()
+        mesh.flip_normals()
 
         geo_model = geo.addModel(ob.name)