diff --git a/io_ogre/ogre/mesh.py b/io_ogre/ogre/mesh.py
index df9524f..073fa0c 100644
--- a/io_ogre/ogre/mesh.py
+++ b/io_ogre/ogre/mesh.py
@@ -234,7 +234,8 @@ def dot_mesh(ob, path, force_name=None, ignore_shape_animation=False, normals=Tr
             mesh.calc_tangents(uvmap=mesh.uv_layers.active.name)
         else:
             # calc_tangents() already calculates split normals for us
-            mesh.calc_normals_split()
+            if bpy.app.version < (4, 1, 0):
+                mesh.calc_normals_split()
 
         progressbar = util.ProgressBar("Faces", len(mesh.polygons))
 
@@ -247,7 +248,10 @@ def dot_mesh(ob, path, force_name=None, ignore_shape_animation=False, normals=Tr
             for loop_idx, idx in zip(F.loop_indices, tri):
                 v = mesh.vertices[ idx ]
 
-                nx,ny,nz = swap( mesh.loops[ loop_idx ].normal )
+                if bpy.app.version < (3, 6, 0):
+                    nx,ny,nz = swap( mesh.loops[ loop_idx ].normal )
+                else:
+                    nx,ny,nz = swap( mesh.corner_normals[ loop_idx ].vector )
 
                 if tangents != 0:
                     tx,ty,tz = swap( mesh.loops[ loop_idx ].tangent )
diff --git a/io_ogre/ogre/ogre_import.py b/io_ogre/ogre/ogre_import.py
index 845abd2..0acf248 100644
--- a/io_ogre/ogre/ogre_import.py
+++ b/io_ogre/ogre/ogre_import.py
@@ -1200,7 +1200,6 @@ def bCreateSubMeshes(meshData, meshName):
         me.vertices.foreach_set("co", unpack_list(verts))
 
         if hasNormals:
-            me.create_normals_split()
             me.vertices.foreach_set("normal", unpack_list(normals))
 
         me.polygons.foreach_set("loop_start", [i for i in range(0, FaceLength * 3, 3)])
@@ -1349,9 +1348,9 @@ def bCreateSubMeshes(meshData, meshName):
 
         # Try to set custom normals
         if hasNormals:
-            me.polygons.foreach_set("use_smooth", [True] * len(me.polygons))
+            if bpy.app.version < (4, 1, 0):
+                me.use_auto_smooth = True
             me.normals_split_custom_set_from_vertices(normals)
-            me.use_auto_smooth = True
 
         Report.orig_vertices = len( me.vertices )
         Report.faces += len( me.polygons )