diff --git a/tools/tunslip6.c b/tools/tunslip6.c
index 49019a66b8b..997528f55fc 100644
--- a/tools/tunslip6.c
+++ b/tools/tunslip6.c
@@ -40,6 +40,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <time.h>
+#include <sys/time.h>
 #include <sys/types.h>
 
 #include <unistd.h>