diff --git a/src/Mod/Fem/femsolver/elmer/writer.py b/src/Mod/Fem/femsolver/elmer/writer.py
index 8cda12ebfe..0e3f4f6586 100644
--- a/src/Mod/Fem/femsolver/elmer/writer.py
+++ b/src/Mod/Fem/femsolver/elmer/writer.py
@@ -566,7 +566,7 @@ class Writer(object):
         pass
 
     def _handleElasticityBodyForces(self, bodies):
-        obj = self._getSingleMember("FemConstraintSelfWeight")
+        obj = self._getSingleMember("Fem::ConstraintSelfWeight")
         if obj is not None:
             for name in bodies:
                 gravity = getConstant("Gravity", "L/T^2")