diff --git a/options.c b/options.c
index ab97ac0..8f385de 100644
--- a/options.c
+++ b/options.c
@@ -22,6 +22,7 @@
 #include "iftop.h"
 #include "options.h"
 #include "cfgfile.h"
+#include "integers.h"
 
 #if !defined(HAVE_INET_ATON) && defined(HAVE_INET_PTON)
 #   define inet_aton(a, b)  inet_pton(AF_INET, (a), (b))