diff --git a/systemd-sslh-generator.c b/systemd-sslh-generator.c
index 01aef63..315e207 100644
--- a/systemd-sslh-generator.c
+++ b/systemd-sslh-generator.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include "common.h"
 
 
 static char* resolve_listen(const char *hostname, const char *port) {