diff --git a/include/cantera/kinetics/InterfaceKinetics.h b/include/cantera/kinetics/InterfaceKinetics.h
index 331514ca5..18aa1064c 100644
--- a/include/cantera/kinetics/InterfaceKinetics.h
+++ b/include/cantera/kinetics/InterfaceKinetics.h
@@ -133,31 +133,21 @@ public:
      * @param fwdROP vector of rates of progress.
      *        length = number of reactions, Units are kmol m-2 s-1.
      */
-    virtual void getFwdRatesOfProgress(doublereal* fwdROP) {
-        updateROP();
-        std::copy(m_ropf.begin(), m_ropf.end(), fwdROP);
-    }
+    virtual void getFwdRatesOfProgress(doublereal* fwdROP);
 
     //! Return the reverse rates of progress for each reaction
     /*!
      * @param revROP vector of rates of progress.
      *        length = number of reactions, Units are kmol m-2 s-1.
      */
-    virtual void getRevRatesOfProgress(doublereal* revROP) {
-        updateROP();
-        std::copy(m_ropr.begin(), m_ropr.end(), revROP);
-    }
+    virtual void getRevRatesOfProgress(doublereal* revROP);
 
     //! Return the net rates of progress for each reaction
     /*!
      * @param netROP vector of rates of progress.
      *        length = number of reactions, Units are kmol m-2 s-1.
      */
-    virtual void getNetRatesOfProgress(doublereal* netROP) {
-        updateROP();
-        std::copy(m_ropnet.begin(), m_ropnet.end(), netROP);
-    }
-
+    virtual void getNetRatesOfProgress(doublereal* netROP);
 
     //! Get the equilibrium constants of all reactions, whether
     //! the reaction is reversible or not.
diff --git a/src/kinetics/InterfaceKinetics.cpp b/src/kinetics/InterfaceKinetics.cpp
index cc49853c0..82867bbe3 100644
--- a/src/kinetics/InterfaceKinetics.cpp
+++ b/src/kinetics/InterfaceKinetics.cpp
@@ -215,6 +215,7 @@ void InterfaceKinetics::setElectricPotential(int n, doublereal V)
     thermo(n).setElectricPotential(V);
     m_redo_rates = true;
 }
+
 //====================================================================================================================
 // Update properties that depend on temperature
 /*
@@ -393,6 +394,23 @@ void InterfaceKinetics::checkPartialEquil()
     }
 }
 
+void InterfaceKinetics::getFwdRatesOfProgress(doublereal* fwdROP)
+{
+    updateROP();
+    std::copy(m_ropf.begin(), m_ropf.end(), fwdROP);
+}
+
+void InterfaceKinetics::getRevRatesOfProgress(doublereal* revROP)
+{
+    updateROP();
+    std::copy(m_ropr.begin(), m_ropr.end(), revROP);
+}
+
+void InterfaceKinetics::getNetRatesOfProgress(doublereal* netROP)
+{
+    updateROP();
+    std::copy(m_ropnet.begin(), m_ropnet.end(), netROP);
+}
 
 /**
  * Get the equilibrium constants of all reactions, whether