diff --git a/wiretap/netscreen.c b/wiretap/netscreen.c
index 947cc8a533..80ef74cc19 100644
--- a/wiretap/netscreen.c
+++ b/wiretap/netscreen.c
@@ -208,8 +208,8 @@ static gboolean netscreen_read(wtap *wth, int *err, gchar **err_info,
 		return FALSE;
 
 	/* Parse the header */
-	pkt_len = parse_netscreen_rec_hdr(&wth->phdr, line, cap_int, &cap_dir, cap_dst,
-		err, err_info);
+	pkt_len = parse_netscreen_rec_hdr(&wth->phdr, line, cap_int, &cap_dir,
+	    cap_dst, err, err_info);
 	if (pkt_len == -1)
 		return FALSE;
 
@@ -241,9 +241,10 @@ static gboolean netscreen_read(wtap *wth, int *err, gchar **err_info,
 /* Used to read packets in random-access fashion */
 static gboolean
 netscreen_seek_read(wtap *wth, gint64 seek_off,
-	struct wtap_pkthdr *phdr, Buffer *buf, int len,
+	struct wtap_pkthdr *phdr, Buffer *buf, int len _U_,
 	int *err, gchar **err_info)
 {
+	int		pkt_len;
 	char		line[NETSCREEN_LINE_LENGTH];
 	char		cap_int[NETSCREEN_MAX_INT_NAME_LENGTH];
 	gboolean	cap_dir;
@@ -261,13 +262,13 @@ netscreen_seek_read(wtap *wth, gint64 seek_off,
 		return FALSE;
 	}
 
-	if (parse_netscreen_rec_hdr(phdr, line, cap_int, &cap_dir, cap_dst,
-           err, err_info) == -1) {
+	pkt_len = parse_netscreen_rec_hdr(phdr, line, cap_int, &cap_dir,
+	    cap_dst, err, err_info);
+	if (pkt_len == -1)
 		return FALSE;
-	}
 
-	if (!parse_netscreen_hex_dump(wth->random_fh, len, cap_int, cap_dst,
-	    phdr, buf, err, err_info))
+	if (!parse_netscreen_hex_dump(wth->random_fh, pkt_len, cap_int,
+	    cap_dst, phdr, buf, err, err_info))
 		return FALSE;
 	return TRUE;
 }