diff --git a/src/thermo/BinarySolutionTabulatedThermo.cpp b/src/thermo/BinarySolutionTabulatedThermo.cpp
index 90135d5ba..e054ce1c0 100644
--- a/src/thermo/BinarySolutionTabulatedThermo.cpp
+++ b/src/thermo/BinarySolutionTabulatedThermo.cpp
@@ -20,17 +20,24 @@ namespace Cantera
 {
 
 BinarySolutionTabulatedThermo::BinarySolutionTabulatedThermo()
+    : m_kk_tab(npos)
+    , m_xlast(-1)
 {
 }
 
 BinarySolutionTabulatedThermo::BinarySolutionTabulatedThermo(const std::string& inputFile,
-        const std::string& id_)
+                                                             const std::string& id_)
+    : m_kk_tab(npos)
+    , m_xlast(-1)
+
 {
     initThermoFile(inputFile, id_);
 }
 
 BinarySolutionTabulatedThermo::BinarySolutionTabulatedThermo(XML_Node& root,
-        const std::string& id_)
+                                                             const std::string& id_)
+    : m_kk_tab(npos)
+    , m_xlast(-1)
 {
     importPhase(root, this);
 }