diff --git a/man/notify-selfcontained-example.c b/man/notify-selfcontained-example.c
index 6bbe4f2e3b..3498d50843 100644
--- a/man/notify-selfcontained-example.c
+++ b/man/notify-selfcontained-example.c
@@ -15,6 +15,7 @@
 #include <stddef.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <time.h>