diff --git a/include/cantera/thermo/DebyeHuckel.h b/include/cantera/thermo/DebyeHuckel.h
index 37786204e..c9e91a48d 100644
--- a/include/cantera/thermo/DebyeHuckel.h
+++ b/include/cantera/thermo/DebyeHuckel.h
@@ -629,7 +629,6 @@ public:
 
     virtual doublereal gibbs_mole() const;
     virtual doublereal cp_mole() const;
-    virtual doublereal cv_mole() const;
 
     //@}
     /** @name Mechanical Equation of State Properties
diff --git a/include/cantera/thermo/IdealMolalSoln.h b/include/cantera/thermo/IdealMolalSoln.h
index 96e383282..3ee75f5eb 100644
--- a/include/cantera/thermo/IdealMolalSoln.h
+++ b/include/cantera/thermo/IdealMolalSoln.h
@@ -185,12 +185,6 @@ public:
      */
     virtual doublereal cp_mole() const;
 
-    //! Molar heat capacity of the solution at constant volume. Units: J/kmol/K.
-    /*!
-     * NOT IMPLEMENTED.
-     */
-    virtual doublereal cv_mole() const;
-
     //@}
     /** @name Mechanical Equation of State Properties
      *
diff --git a/src/thermo/DebyeHuckel.cpp b/src/thermo/DebyeHuckel.cpp
index d595c20ee..7c283b52c 100644
--- a/src/thermo/DebyeHuckel.cpp
+++ b/src/thermo/DebyeHuckel.cpp
@@ -188,11 +188,6 @@ doublereal DebyeHuckel::cp_mole() const
     return mean_X(m_tmpV);
 }
 
-doublereal DebyeHuckel::cv_mole() const
-{
-    throw NotImplementedError("DebyeHuckel::cv_mole");
-}
-
 // ------- Mechanical Equation of State Properties ------------------------
 
 void DebyeHuckel::calcDensity()
diff --git a/src/thermo/IdealMolalSoln.cpp b/src/thermo/IdealMolalSoln.cpp
index 7c5717640..2a054f187 100644
--- a/src/thermo/IdealMolalSoln.cpp
+++ b/src/thermo/IdealMolalSoln.cpp
@@ -161,11 +161,6 @@ doublereal IdealMolalSoln::cp_mole() const
     return mean_X(m_tmpV);
 }
 
-doublereal IdealMolalSoln::cv_mole() const
-{
-    throw NotImplementedError("IdealMolalSoln::cv_mole");
-}
-
 // ------- Mechanical Equation of State Properties ------------------------
 
 void IdealMolalSoln::calcDensity()