diff --git a/include/cantera/thermo/PDSS.h b/include/cantera/thermo/PDSS.h
index b67d80d20..ab0d47062 100644
--- a/include/cantera/thermo/PDSS.h
+++ b/include/cantera/thermo/PDSS.h
@@ -439,7 +439,7 @@ public:
     virtual void setTemperature(doublereal temp);
 
     //! Return the current stored temperature
-    doublereal temperature() const;
+    virtual doublereal temperature() const;
 
     //! Set the internal temperature and pressure
     /*!
diff --git a/include/cantera/thermo/PDSS_IdealGas.h b/include/cantera/thermo/PDSS_IdealGas.h
index 3719f9ae1..ddfdb762d 100644
--- a/include/cantera/thermo/PDSS_IdealGas.h
+++ b/include/cantera/thermo/PDSS_IdealGas.h
@@ -114,7 +114,7 @@ public:
     virtual doublereal pressure() const;
     virtual void setPressure(doublereal pres);
     virtual void setTemperature(doublereal temp);
-    doublereal temperature() const;
+    virtual doublereal temperature() const;
     virtual void setState_TP(doublereal temp, doublereal pres);
     virtual void setState_TR(doublereal temp, doublereal rho);
 
diff --git a/include/cantera/thermo/PDSS_IonsFromNeutral.h b/include/cantera/thermo/PDSS_IonsFromNeutral.h
index dda684f05..c137c5d39 100644
--- a/include/cantera/thermo/PDSS_IonsFromNeutral.h
+++ b/include/cantera/thermo/PDSS_IonsFromNeutral.h
@@ -128,7 +128,7 @@ public:
     //! @{
 
     virtual void setTemperature(doublereal temp);
-    doublereal temperature() const;
+    virtual doublereal temperature() const;
     virtual void setState_TP(doublereal temp, doublereal pres);
     virtual void setState_TR(doublereal temp, doublereal rho);