diff --git a/Cantera/src/kinetics/importKinetics.cpp b/Cantera/src/kinetics/importKinetics.cpp
index 480f909d7..5313286ab 100644
--- a/Cantera/src/kinetics/importKinetics.cpp
+++ b/Cantera/src/kinetics/importKinetics.cpp
@@ -43,6 +43,8 @@
 #include "xml.h"
 #include "ctml.h"
 
+#include <cstdlib>
+
 using namespace ctml;
 using namespace std;