diff --git a/io_scene_fbx/import_fbx.py b/io_scene_fbx/import_fbx.py
index 48943d36c38c31cfbef49a942ad5c8aad1315883..bee5c0e34a57bdd93664d421d1a605df4cbfd9b3 100644
--- a/io_scene_fbx/import_fbx.py
+++ b/io_scene_fbx/import_fbx.py
@@ -1190,7 +1190,7 @@ def blen_read_geom(fbx_tmpl, fbx_obj, settings):
             return geom_mat_no * Vector(v)
         ok_normals = blen_read_geom_layer_normal(fbx_obj, mesh, nortrans)
 
-    mesh.validate(cleanup_cddata=False)  # *Very* important to not remove lnors here!
+    mesh.validate(clean_customdata=False)  # *Very* important to not remove lnors here!
 
     if ok_normals:
         clnors = array.array('f', [0.0] * (len(mesh.loops) * 3))
diff --git a/io_scene_obj/import_obj.py b/io_scene_obj/import_obj.py
index 6136538d6e5c7e3854b854fbd7391a52a2a0644f..bc184b4e8620e158c26584e89adc3679c7e11a42 100644
--- a/io_scene_obj/import_obj.py
+++ b/io_scene_obj/import_obj.py
@@ -616,7 +616,7 @@ def create_mesh(new_objects,
         # edges should be a list of (a, b) tuples
         me.edges.foreach_set("vertices", unpack_list(edges))
 
-    me.validate(cleanup_cddata=False)  # *Very* important to not remove lnors here!
+    me.validate(clean_customdata=False)  # *Very* important to not remove lnors here!
     me.update(calc_edges=use_edges)
 
     # Un-tessellate as much as possible, in case we had to triangulate some ngons...