diff --git a/gdb_proto.c b/gdb_proto.c
index f6bef3c..caa6004 100644
--- a/gdb_proto.c
+++ b/gdb_proto.c
@@ -23,6 +23,7 @@
 #include <sys/socket.h>
 #include <unistd.h>
 #include <errno.h>
+#include <string.h>
 
 #include "gdb_proto.h"
 #include "output.h"