diff --git a/src/lib/knx/knxnet.h b/src/lib/knx/knxnet.h
index 13295ea4..38162bb0 100644
--- a/src/lib/knx/knxnet.h
+++ b/src/lib/knx/knxnet.h
@@ -34,6 +34,7 @@
 #include <endian.h>
 #include <string>
 #include <cstdio>
+#include <ctime>
 #include "lib/knx/knx.h"
 
 namespace ebusd {