diff --git a/include/cantera/kinetics/ReactionData.h b/include/cantera/kinetics/ReactionData.h
index 001f2a99d..fb07624f8 100644
--- a/include/cantera/kinetics/ReactionData.h
+++ b/include/cantera/kinetics/ReactionData.h
@@ -21,6 +21,7 @@ public:
         reactionType = ELEMENTARY_RXN;
         validate = false;
         number = 0;
+        rxn_number = 0;
         reversible = true;
         rateCoeffType = ARRHENIUS_REACTION_RATECOEFF_TYPE;
         falloffType = NONE;
@@ -43,6 +44,7 @@ public:
 
     bool validate;
     int number;
+    int rxn_number;
     std::vector<size_t> reactants;
     std::vector<size_t> products;
     vector_fp rorder;
diff --git a/src/kinetics/importKinetics.cpp b/src/kinetics/importKinetics.cpp
index 2c7127572..2515e0438 100644
--- a/src/kinetics/importKinetics.cpp
+++ b/src/kinetics/importKinetics.cpp
@@ -852,6 +852,7 @@ bool rxninfo::installReaction(int iRxn, const XML_Node& r, Kinetics& kin,
 
     rdata.equation = eqn;
     rdata.number = iRxn;
+    rdata.rxn_number = iRxn;
 
     // Read the rate coefficient data from the XML file. Trigger an
     // exception for negative A unless specifically authorized.