diff --git a/MaterialLib/Fluid/Viscosity/TemperatureDependentViscosity.h b/MaterialLib/Fluid/Viscosity/TemperatureDependentViscosity.h
index fc65e3980115f1bc0cddbe954283611a2c777e35..84943a015419fa07203b8b72199287c6721598af 100644
--- a/MaterialLib/Fluid/Viscosity/TemperatureDependentViscosity.h
+++ b/MaterialLib/Fluid/Viscosity/TemperatureDependentViscosity.h
@@ -25,10 +25,10 @@ namespace Fluid
 {
 /**
  *  Class of a temperature dependent viscosity model, which provides a good fit
- *  over temperature variations of 150 °C.
+ *  over temperature variations of 150 K.
  *
  *   \f[
- *        \mu = \mu_0\, exp(-\frac{T-T_c}{T_v})
+ *        \mu = \mu_0\, \exp(-\frac{T-T_c}{T_v})
  *   \f]
  *   where
  *    \f{eqnarray*}{