diff --git a/dic/dic_internals.h b/dic/dic_internals.h
index f524194..90a2424 100644
--- a/dic/dic_internals.h
+++ b/dic/dic_internals.h
@@ -22,6 +22,7 @@
 #define DIC_INTERNALS_H_
 
 #include <stdint.h>
+#include <cstring> // For memcpy
 #include "config.h"
 
 /**