diff --git a/ot_fullscrape.c b/ot_fullscrape.c
index f9129e4..4baaf74 100644
--- a/ot_fullscrape.c
+++ b/ot_fullscrape.c
@@ -4,6 +4,7 @@
    $id$ */
 
 /* System */
+#include <sys/param.h>
 #include <sys/uio.h>
 #include <stdio.h>
 #include <string.h>