--- a/src/scim_skk_imengine_setup.cpp
+++ b/src/scim_skk_imengine_setup.cpp
@@ -39,6 +39,8 @@
 #include "scim_skk_intl.h"
 #include "scim_skk_setup_dictionaries.h"
 
+#include <cstring>
+
 using namespace scim;
 
 namespace scim_skk {