diff --git a/src/thermophysicalModels/specie/reaction/Reactions/ReversibleReaction/ReversibleReaction.C b/src/thermophysicalModels/specie/reaction/Reactions/ReversibleReaction/ReversibleReaction.C
index d26b98d2c8..b6be7397bc 100644
--- a/src/thermophysicalModels/specie/reaction/Reactions/ReversibleReaction/ReversibleReaction.C
+++ b/src/thermophysicalModels/specie/reaction/Reactions/ReversibleReaction/ReversibleReaction.C
@@ -128,7 +128,7 @@ Foam::scalar Foam::ReversibleReaction
     const scalarField& c
 ) const
 {
-    return kfwd/max(this->Kc(p, T), 1e-6);
+    return kfwd/max(this->Kc(p, T), VSMALL);
 }