diff --git a/wiretap/libpcap.c b/wiretap/libpcap.c
index 877464c3e7..1a880a7e53 100644
--- a/wiretap/libpcap.c
+++ b/wiretap/libpcap.c
@@ -99,6 +99,8 @@ wtap_open_return_val libpcap_open(wtap *wth, int *err, gchar **err_info)
 	int n_subtypes;
 	int best_subtype;
 	int i;
+	int skip_size = 0;
+	int sizebytes;
 
 	/* Read in the number that should be at the start of a "libpcap" file */
 	if (!wtap_read_bytes(wth->fh, &magic, sizeof magic, err, err_info)) {
@@ -109,6 +111,10 @@ wtap_open_return_val libpcap_open(wtap *wth, int *err, gchar **err_info)
 
 	switch (magic) {
 
+	case PCAP_IXIAHW_MAGIC:
+	case PCAP_IXIASW_MAGIC:
+		skip_size = 1;
+		/* FALLTHROUGH */
 	case PCAP_MAGIC:
 		/* Host that wrote it has our byte order, and was running
 		   a program using either standard or ss990417 libpcap. */
@@ -125,6 +131,10 @@ wtap_open_return_val libpcap_open(wtap *wth, int *err, gchar **err_info)
 		wth->file_tsprec = WTAP_TSPREC_USEC;
 		break;
 
+	case PCAP_SWAPPED_IXIAHW_MAGIC:
+	case PCAP_SWAPPED_IXIASW_MAGIC:
+		skip_size = 1;
+		/* FALLTHROUGH */
 	case PCAP_SWAPPED_MAGIC:
 		/* Host that wrote it has a byte order opposite to ours,
 		   and was running a program using either standard or
@@ -170,6 +180,8 @@ wtap_open_return_val libpcap_open(wtap *wth, int *err, gchar **err_info)
 	/* Read the rest of the header. */
 	if (!wtap_read_bytes(wth->fh, &hdr, sizeof hdr, err, err_info))
 		return WTAP_OPEN_ERROR;
+	if (skip_size==1 && !wtap_read_bytes(wth->fh, &sizebytes, sizeof sizebytes, err, err_info))
+		return WTAP_OPEN_ERROR;
 
 	if (byte_swapped) {
 		/* Byte-swap the header fields about which we care. */
diff --git a/wiretap/libpcap.h b/wiretap/libpcap.h
index 43f68907b9..d9c73380c1 100644
--- a/wiretap/libpcap.h
+++ b/wiretap/libpcap.h
@@ -41,6 +41,10 @@
 
    applied; PCAP_SWAPPED_MODIFIED_MAGIC is the byte-swapped version.
 
+   PCAP_IXIAMODIFIED_MAGIC is used by IXIA's lcap file format. It adds
+   a length field at the end of the file header (size of all records).
+   PCAP_SWAPPED_IXIAMODIFIED_MAGIC is the byte-swapped version.
+
    PCAP_NSEC_MAGIC is for Ulf Lamping's modified "libpcap" format,
    which uses the same common file format as PCAP_MAGIC, but the
    timestamps are saved in nanosecond resolution instead of microseconds.
@@ -49,6 +53,10 @@
 #define	PCAP_SWAPPED_MAGIC		0xd4c3b2a1
 #define	PCAP_MODIFIED_MAGIC		0xa1b2cd34
 #define	PCAP_SWAPPED_MODIFIED_MAGIC	0x34cdb2a1
+#define PCAP_IXIAHW_MAGIC		0x1c0001ac
+#define PCAP_SWAPPED_IXIAHW_MAGIC	0xac01001c
+#define PCAP_IXIASW_MAGIC		0x1c0001ab
+#define PCAP_SWAPPED_IXIASW_MAGIC	0xab01001c
 #define	PCAP_NSEC_MAGIC			0xa1b23c4d
 #define	PCAP_SWAPPED_NSEC_MAGIC		0x4d3cb2a1