diff --git a/include/cantera/oneD/IonFlow.h b/include/cantera/oneD/IonFlow.h
index 6b8e7e39df..5ce7019e02 100644
--- a/include/cantera/oneD/IonFlow.h
+++ b/include/cantera/oneD/IonFlow.h
@@ -79,9 +79,8 @@ class IonFlow : public FreeFlame
                               vector_fp& mobi_e_fixed);
 
 protected:
-    virtual void updateProperties(size_t jg, double* x, double* rsd,
-                                  int* diag, double rdt, size_t j0,
-                                  size_t j1, size_t jmin, size_t jmax);
+    virtual void evalResidual(double* x, double* rsd, int* diag,
+                              double rdt, size_t jmin, size_t jmax);
     virtual void updateTransport(double* x, size_t j0, size_t j1);
     virtual void updateDiffFluxes(const double* x, size_t j0, size_t j1);
     //! Solving phase one: the fluxes of charged species are turned off
diff --git a/include/cantera/oneD/StFlow.h b/include/cantera/oneD/StFlow.h
index 600bd3e86c..9f31c9c238 100644
--- a/include/cantera/oneD/StFlow.h
+++ b/include/cantera/oneD/StFlow.h
@@ -242,9 +242,11 @@ class StFlow : public Domain1D
         m_kin->getNetProductionRates(&m_wdot(0,j));
     }
 
-    virtual void updateProperties(size_t jg, double* x, double* rsd,
-                                  int* diag, double rdt, size_t j0,
-                                  size_t j1, size_t jmin, size_t jmax);
+    virtual void updateProperties(size_t jg, double* x, double* rsd, int* diag,
+                                  double rdt, size_t jmin, size_t jmax);
+
+    virtual void evalResidual(double* x, double* rsd, int* diag,
+                              double rdt, size_t jmin, size_t jmax);
 
     /**
      * Update the thermodynamic properties from point j0 to point j1
diff --git a/src/oneD/IonFlow.cpp b/src/oneD/IonFlow.cpp
index d7328ce9f3..92ec5ae062 100644
--- a/src/oneD/IonFlow.cpp
+++ b/src/oneD/IonFlow.cpp
@@ -230,11 +230,10 @@ void IonFlow::setElectricPotential(const double v1, const double v2)
     m_outletVoltage = v2;
 }
 
-void IonFlow::updateProperties(size_t jg, double* x, double* rsd,
-                               int* diag, double rdt, size_t j0,
-                               size_t j1, size_t jmin, size_t jmax)
+void IonFlow::evalResidual(double* x, double* rsd, int* diag,
+                           double rdt, size_t jmin, size_t jmax)
 {
-    StFlow::updateProperties(jg, x, rsd, diag, rdt, j0, j1, jmin, jmax);
+    StFlow::evalResidual(x, rsd, diag, rdt, jmin, jmax);
     if (m_stage != 3) {
         return;
     }
diff --git a/src/oneD/StFlow.cpp b/src/oneD/StFlow.cpp
index 660fe8075a..e5d8962195 100644
--- a/src/oneD/StFlow.cpp
+++ b/src/oneD/StFlow.cpp
@@ -240,17 +240,17 @@ void StFlow::eval(size_t jg, doublereal* xg,
         jmax = std::min(jpt+1,m_points-1);
     }
 
+    updateProperties(jg, x, rsd, diag, rdt, jmin, jmax);
+    evalResidual(x, rsd, diag, rdt, jmin, jmax);
+}
+
+void StFlow::updateProperties(size_t jg, double* x, double* rsd, int* diag,
+                              double rdt, size_t jmin, size_t jmax)
+{
     // properties are computed for grid points from j0 to j1
     size_t j0 = std::max<size_t>(jmin, 1) - 1;
     size_t j1 = std::min(jmax+1,m_points-1);
 
-    updateProperties(jg, x, rsd, diag, rdt, j0, j1, jmin, jmax);
-}
-
-void StFlow::updateProperties(size_t jg, double* x, double* rsd,
-                              int* diag, double rdt, size_t j0,
-                              size_t j1, size_t jmin, size_t jmax)
-{
     updateThermo(x, j0, j1);
     if (jg == npos || m_force_full_update) {
         // update transport properties only if a Jacobian is not being
@@ -267,7 +267,11 @@ void StFlow::updateProperties(size_t jg, double* x, double* rsd,
     // update the species diffusive mass fluxes whether or not a
     // Jacobian is being evaluated
     updateDiffFluxes(x, j0, j1);
+}
 
+void StFlow::evalResidual(double* x, double* rsd, int* diag,
+                          double rdt, size_t jmin, size_t jmax)
+{
     //----------------------------------------------------
     // evaluate the residual equations at all required
     // grid points