diff --git a/src/Mod/Fem/femsolver/calculix/tasks.py b/src/Mod/Fem/femsolver/calculix/tasks.py
index 6383d33ff4..d63c20b7f7 100644
--- a/src/Mod/Fem/femsolver/calculix/tasks.py
+++ b/src/Mod/Fem/femsolver/calculix/tasks.py
@@ -121,7 +121,7 @@ class Results(run.Results):
 
     def purge_results(self):
         for m in FemUtils.getMember(self.analysis, "Fem::FemResultObject"):
-            if FemUtils.isOfType(m.Mesh, "FemMeshResult"):
+            if FemUtils.isOfType(m.Mesh, "Fem::FemMeshResult"):
                 self.analysis.Document.removeObject(m.Mesh.Name)
             self.analysis.Document.removeObject(m.Name)
         App.ActiveDocument.recompute()