diff --git a/include/cantera/kinetics/BulkKinetics.h b/include/cantera/kinetics/BulkKinetics.h
index 9ba6849f4..025b9f469 100644
--- a/include/cantera/kinetics/BulkKinetics.h
+++ b/include/cantera/kinetics/BulkKinetics.h
@@ -40,6 +40,9 @@ public:
     virtual void finalize();
     virtual bool ready() const;
 
+    virtual void setMultiplier(size_t i, double f);
+
+
 protected:
     virtual void addElementaryReaction(ReactionData& r);
     virtual void addElementaryReaction(ElementaryReaction& r);
diff --git a/include/cantera/kinetics/Kinetics.h b/include/cantera/kinetics/Kinetics.h
index 6f3a9fd2b..8c1014196 100644
--- a/include/cantera/kinetics/Kinetics.h
+++ b/include/cantera/kinetics/Kinetics.h
@@ -865,7 +865,7 @@ public:
      *  @param i  index of the reaction
      *  @param f  value of the multiplier.
      */
-    void setMultiplier(size_t i, doublereal f) {
+    virtual void setMultiplier(size_t i, doublereal f) {
         m_perturb[i] = f;
     }
 
diff --git a/src/kinetics/BulkKinetics.cpp b/src/kinetics/BulkKinetics.cpp
index eb138a823..97f63e829 100644
--- a/src/kinetics/BulkKinetics.cpp
+++ b/src/kinetics/BulkKinetics.cpp
@@ -191,4 +191,9 @@ bool BulkKinetics::ready() const
     return m_finalized;
 }
 
+void BulkKinetics::setMultiplier(size_t i, double f) {
+    Kinetics::setMultiplier(i, f);
+    m_ROP_ok = false;
+}
+
 }