diff --git a/src/Mod/Fem/femsolver/elmer/writer.py b/src/Mod/Fem/femsolver/elmer/writer.py
index a8ea731a1b..f79116fb4e 100644
--- a/src/Mod/Fem/femsolver/elmer/writer.py
+++ b/src/Mod/Fem/femsolver/elmer/writer.py
@@ -91,8 +91,8 @@ def _getAllSubObjects(obj):
     return s
 
 
-def getConstant(name, dimension):
-    return convert(CONSTS_DEF[name], dimension)
+def getConstant(name, unit_dimension):
+    return convert(CONSTS_DEF[name], unit_dimension)
 
 
 class Writer(object):