diff --git a/ProcessLib/ThermoRichardsMechanics/ConstitutiveCommon/FluidThermalExpansion.cpp b/ProcessLib/ThermoRichardsMechanics/ConstitutiveCommon/FluidThermalExpansion.cpp
index 0d930719e82fe609d8e9881377efc54b3c0e8dc6..4c9f04b1303687d8b417cdc3799cc30100f2071e 100644
--- a/ProcessLib/ThermoRichardsMechanics/ConstitutiveCommon/FluidThermalExpansion.cpp
+++ b/ProcessLib/ThermoRichardsMechanics/ConstitutiveCommon/FluidThermalExpansion.cpp
@@ -30,7 +30,7 @@ void FluidThermalExpansionModel<DisplacementDim>::eval(
     namespace MPL = MaterialPropertyLib;
     MPL::VariableArray variables;
     variables.phase_pressure = -p_cap_data.p_cap;
-    variables.temperature = -T_data.T;
+    variables.temperature = T_data.T;
 
     double const phi = poro_data.phi;
     double const alpha = biot_data.alpha;