diff --git a/include/cantera/kinetics/RxnRates.h b/include/cantera/kinetics/RxnRates.h
index ba93ab7e7..413985513 100644
--- a/include/cantera/kinetics/RxnRates.h
+++ b/include/cantera/kinetics/RxnRates.h
@@ -174,7 +174,7 @@ public:
     }
 
 protected:
-    doublereal m_logA, m_b, m_E, m_A;
+    doublereal m_b, m_E, m_A;
     doublereal m_acov, m_ecov, m_mcov;
     std::vector<size_t> m_sp, m_msp;
     vector_fp m_ac, m_ec, m_mc;
diff --git a/src/kinetics/RxnRates.cpp b/src/kinetics/RxnRates.cpp
index 50b21e8aa..ec7f947db 100644
--- a/src/kinetics/RxnRates.cpp
+++ b/src/kinetics/RxnRates.cpp
@@ -26,8 +26,7 @@ Arrhenius::Arrhenius(doublereal A, doublereal b, doublereal E)
 }
 
 SurfaceArrhenius::SurfaceArrhenius()
-    : m_logA(-1.0E300)
-    , m_b(0.0)
+    : m_b(0.0)
     , m_E(0.0)
     , m_A(0.0)
     , m_acov(0.0)
@@ -39,8 +38,7 @@ SurfaceArrhenius::SurfaceArrhenius()
 }
 
 SurfaceArrhenius::SurfaceArrhenius(double A, double b, double Ta)
-    : m_logA(std::log(A))
-    , m_b(b)
+    : m_b(b)
     , m_E(Ta)
     , m_A(A)
     , m_acov(0.0)