diff --git a/Cantera/clib/src/ctxml.cpp b/Cantera/clib/src/ctxml.cpp
index b61c11d84..89e1b7d6d 100644
--- a/Cantera/clib/src/ctxml.cpp
+++ b/Cantera/clib/src/ctxml.cpp
@@ -14,6 +14,7 @@
 #include "Cabinet.h"
 #include "Storage.h"
 
+#include <string.h>
 
 // Values returned for error conditions
 #define ERR -999