diff --git a/include/cantera/thermo/MixtureFugacityTP.h b/include/cantera/thermo/MixtureFugacityTP.h
index 6f2278b2b2..20e12f5e5c 100644
--- a/include/cantera/thermo/MixtureFugacityTP.h
+++ b/include/cantera/thermo/MixtureFugacityTP.h
@@ -551,6 +551,8 @@ class MixtureFugacityTP : public ThermoPhase
     };
 
 protected:
+    virtual void invalidateCache();
+
     //! Current value of the pressure
     /*!
      * Because the pressure is now a calculation, we store the result of the
diff --git a/include/cantera/thermo/ThermoPhase.h b/include/cantera/thermo/ThermoPhase.h
index f0f22f2d67..c9290f4f43 100644
--- a/include/cantera/thermo/ThermoPhase.h
+++ b/include/cantera/thermo/ThermoPhase.h
@@ -175,7 +175,7 @@ class ThermoPhase : public Phase
      */
     virtual void modifyOneHf298SS(const size_t k, const doublereal Hf298New) {
         m_spthermo->modifyOneHf298(k, Hf298New);
-        m_tlast += 0.0001234;
+        invalidateCache();
     }
 
     //! Maximum temperature for which the thermodynamic data for the species
diff --git a/include/cantera/thermo/VPStandardStateTP.h b/include/cantera/thermo/VPStandardStateTP.h
index 9e1c0b1c11..34b3b448ae 100644
--- a/include/cantera/thermo/VPStandardStateTP.h
+++ b/include/cantera/thermo/VPStandardStateTP.h
@@ -274,6 +274,8 @@ class VPStandardStateTP : public ThermoPhase
     const PDSS* providePDSS(size_t k) const;
 
 protected:
+    virtual void invalidateCache();
+
     //! Current value of the pressure - state variable
     /*!
      * Because we are now using the pressure as a state variable, we need to
diff --git a/src/thermo/LatticeSolidPhase.cpp b/src/thermo/LatticeSolidPhase.cpp
index d91e86709c..6f4b124218 100644
--- a/src/thermo/LatticeSolidPhase.cpp
+++ b/src/thermo/LatticeSolidPhase.cpp
@@ -455,7 +455,7 @@ void LatticeSolidPhase::modifyOneHf298SS(const size_t k, const doublereal Hf298N
             l_spthermo.modifyOneHf298(kk, Hf298New);
         }
     }
-    m_tlast += 0.0001234;
+    invalidateCache();
     _updateThermo();
 }
 
diff --git a/src/thermo/MixtureFugacityTP.cpp b/src/thermo/MixtureFugacityTP.cpp
index c154bf750f..8ea24f6152 100644
--- a/src/thermo/MixtureFugacityTP.cpp
+++ b/src/thermo/MixtureFugacityTP.cpp
@@ -114,7 +114,7 @@ void MixtureFugacityTP::getEnthalpy_RT(doublereal* hrt) const
 void MixtureFugacityTP::modifyOneHf298SS(const size_t k, const doublereal Hf298New)
 {
     m_spthermo->modifyOneHf298(k, Hf298New);
-    m_Tlast_ref += 0.0001234;
+    invalidateCache();
 }
 
 void MixtureFugacityTP::getEntropy_R(doublereal* sr) const
@@ -878,4 +878,10 @@ void MixtureFugacityTP::_updateReferenceStateThermo() const
     }
 }
 
+void MixtureFugacityTP::invalidateCache()
+{
+    ThermoPhase::invalidateCache();
+    m_Tlast_ref += 0.001234;
+}
+
 }
diff --git a/src/thermo/VPStandardStateTP.cpp b/src/thermo/VPStandardStateTP.cpp
index 1826e4edbb..c9ce806479 100644
--- a/src/thermo/VPStandardStateTP.cpp
+++ b/src/thermo/VPStandardStateTP.cpp
@@ -132,7 +132,7 @@ void VPStandardStateTP::getEnthalpy_RT(doublereal* hrt) const
 void VPStandardStateTP::modifyOneHf298SS(const size_t k, const doublereal Hf298New)
 {
     m_spthermo->modifyOneHf298(k, Hf298New);
-    m_Tlast_ss += 0.0001234;
+    invalidateCache();
 }
 
 void VPStandardStateTP::getEntropy_R(doublereal* srt) const
@@ -302,6 +302,12 @@ const PDSS* VPStandardStateTP::providePDSS(size_t k) const
     return m_PDSS_storage[k];
 }
 
+void VPStandardStateTP::invalidateCache()
+{
+    ThermoPhase::invalidateCache();
+    m_Tlast_ss += 0.0001234;
+}
+
 void VPStandardStateTP::initThermoXML(XML_Node& phaseNode, const std::string& id)
 {
     for (size_t k = 0; k < m_kk; k++) {