diff --git a/invesalius/data/surface.py b/invesalius/data/surface.py
index 56cd6c4..15c92ed 100644
--- a/invesalius/data/surface.py
+++ b/invesalius/data/surface.py
@@ -865,6 +865,7 @@ class SurfaceManager():
                 normals.AutoOrientNormalsOn()
                 #  normals.GetOutput().ReleaseDataFlagOn()
                 normals.UpdateInformation()
+                normals.Update()
                 polydata = normals.GetOutput()
 
             filename = filename.encode(wx.GetDefaultPyEncoding())
--
libgit2 0.21.2