diff --git a/export_geo.py b/export_geo.py
index 9503205..3ba7f06 100644
--- a/export_geo.py
+++ b/export_geo.py
@@ -92,7 +92,7 @@ def convert_mesh(geo_model, mesh, obj):
                 w = [group.name, weight.weight]
                 weights.append(w)
             print("i: %s   f_verts: %s   uv: %s" % (i, repr(f_verts), repr(uv)))
-            gv = GeoVertex(v.co, v.normal, uv[i], weights)
+            gv = GeoVertex(v.co, -v.normal, uv[i], weights)
             geoverts.append(gv)
         geoverts.reverse()
         geomesh.addFace(geoverts, texture_name)