diff --git a/Cantera/src/converters/ckr_utils.cpp b/Cantera/src/converters/ckr_utils.cpp
index 2124095d5..c511bb688 100755
--- a/Cantera/src/converters/ckr_utils.cpp
+++ b/Cantera/src/converters/ckr_utils.cpp
@@ -15,6 +15,7 @@
 
 #include <math.h>
 #include "ckr_utils.h"
+#include <string.h>
 
 using namespace std;