diff --git a/src/Mod/Fem/femsolver/elmer/writer.py b/src/Mod/Fem/femsolver/elmer/writer.py
index f79116fb4e..dfe7560075 100644
--- a/src/Mod/Fem/femsolver/elmer/writer.py
+++ b/src/Mod/Fem/femsolver/elmer/writer.py
@@ -66,7 +66,7 @@ UNITS = {
 CONSTS_DEF = {
     "Gravity": constants.gravity(),
     "StefanBoltzmann": constants.stefan_boltzmann(),
-    "PermittivityOfVacuum": constants.permittivity_of_vakuum(),
+    "PermittivityOfVacuum": constants.vacuum_permittivity(),
     "BoltzmannConstant": constants.boltzmann_constant(),
 }
 
diff --git a/src/Mod/Fem/femtools/constants.py b/src/Mod/Fem/femtools/constants.py
index 0e00c24f73..0533e3dae7 100644
--- a/src/Mod/Fem/femtools/constants.py
+++ b/src/Mod/Fem/femtools/constants.py
@@ -40,7 +40,7 @@ def stefan_boltzmann():
     return "5.67e-8 W/(m^2*K^4)"
 
 
-def permittivity_of_vakuum():
+def vacuum_permittivity():
     # https://forum.freecadweb.org/viewtopic.php?f=18&p=400959#p400959
     return "8.8542e-12 s^4*A^2 / (m^3*kg)"