diff --git a/src/unix.cpp b/src/unix.cpp
index b349bf9..a27f3a9 100644
--- a/src/unix.cpp
+++ b/src/unix.cpp
@@ -7,6 +7,7 @@
  * This library is released under MIT license
  */
 
+#include <cstring>
 #include <string>
 #include <cxxabi.h>