diff --git a/sink/logging.c b/sink/logging.c
index 81fc67b..c42bbf7 100644
--- a/sink/logging.c
+++ b/sink/logging.c
@@ -4,6 +4,7 @@
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stdio.h>
+#include <string.h>
 
 extern bool verbose;
 int facility = LOG_LOCAL0;