diff --git a/output/pcap/ulogd_output_PCAP.c b/output/pcap/ulogd_output_PCAP.c
index e7798f2..51c4ceb 100644
--- a/output/pcap/ulogd_output_PCAP.c
+++ b/output/pcap/ulogd_output_PCAP.c
@@ -154,9 +154,15 @@ static int interp_pcap(struct ulogd_pluginstance *upi)
 	switch (ikey_get_u8(&res[5])) {
 	case 2: /* INET */
 		pchdr.len = ikey_get_u16(&res[2]);
+		if (pchdr.caplen > 20 + 8) {
+			pchdr.caplen = 20 + 8;
+		}
 		break;
 	case 10: /* INET6 -- payload length + header length */
 		pchdr.len = ikey_get_u16(&res[6]) + 40;
+		if (pchdr.caplen > 40 + 8) {
+			pchdr.caplen = 40 + 8;
+		}
 		break;
 	default:
 		pchdr.len = pchdr.caplen;
-- 
2.25.4