diff --git a/src/thermophysicalModels/reactionThermo/chemistryReaders/chemkinReader/chemkinLexer.L b/src/thermophysicalModels/reactionThermo/chemistryReaders/chemkinReader/chemkinLexer.L
index ec6ea77ec1..5c704720ae 100644
--- a/src/thermophysicalModels/reactionThermo/chemistryReaders/chemkinReader/chemkinLexer.L
+++ b/src/thermophysicalModels/reactionThermo/chemistryReaders/chemkinReader/chemkinLexer.L
@@ -309,8 +309,8 @@ List<specieElement> currentSpecieComposition(5);
 scalar currentLowT = 0;
 scalar currentHighT = 0;
 scalar currentCommonT = 0;
-gasThermoPhysics::coeffArray highCpCoeffs;
-gasThermoPhysics::coeffArray lowCpCoeffs;
+gasThermoPhysics::coeffArray highCpCoeffs = {0, 0, 0, 0, 0, 0, 0};
+gasThermoPhysics::coeffArray lowCpCoeffs = {0, 0, 0, 0, 0, 0, 0};
 
 gasReaction::specieCoeffs currentSpecieCoeff;