diff --git a/doc/netscaler-client-ip-insertion-protocol.txt b/doc/netscaler-client-ip-insertion-protocol.txt
index 6f77f65..559d98a 100644
--- a/doc/netscaler-client-ip-insertion-protocol.txt
+++ b/doc/netscaler-client-ip-insertion-protocol.txt
@@ -10,7 +10,9 @@
   https://www.citrix.com/blogs/2016/04/25/how-to-enable-client-ip-in-tcpip-option-of-netscaler/
 
 When CIP is enabled on the NetScaler, then a TCP packet is inserted just after
-the TCP handshake. This is composed as:
+the TCP handshake. Two versions of the CIP extension exist.
+
+Legacy (NetScaler < 10.5)
 
   - CIP magic number : 4 bytes
     Both sender and receiver have to agree on a magic number so that
@@ -27,3 +29,27 @@
   - TCP header : >= 20 bytes
     Contains the header of the last TCP packet sent by the client during TCP
     handshake.
+
+Standard (NetScaler >= 10.5)
+
+  - CIP magic number : 4 bytes
+    Both sender and receiver have to agree on a magic number so that
+    they both handle the incoming data as a NetScaler Client IP insertion
+    packet.
+
+  - CIP length : 4 bytes
+    Defines the total length on the CIP header.
+
+  - CIP type: 2 bytes
+    Always set to 1.
+
+  - Header length : 2 bytes
+    Defines the length on the remaining data.
+
+  - IP header : >= 20 bytes if IPv4, 40 bytes if IPv6
+    Contains the header of the last IP packet sent by the client during TCP
+    handshake.
+
+  - TCP header : >= 20 bytes
+    Contains the header of the last TCP packet sent by the client during TCP
+    handshake.
diff --git a/src/connection.c b/src/connection.c
index 58bf4a5..0f8acb0 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -678,14 +678,8 @@
 }
 
 /* This handshake handler waits a NetScaler Client IP insertion header
- * at the beginning of the raw data stream. The header looks like this:
- *
- *   4 bytes:   CIP magic number
- *   4 bytes:   Header length
- *   20+ bytes: Header of the last IP packet sent by the client during
- *              TCP handshake.
- *   20+ bytes: Header of the last TCP packet sent by the client during
- *              TCP handshake.
+ * at the beginning of the raw data stream. The header format is
+ * described in doc/netscaler-client-ip-insertion-protocol.txt
  *
  * This line MUST be at the beginning of the buffer and MUST NOT be
  * fragmented.
@@ -735,25 +729,39 @@
 	}
 
 	/* Fail if buffer length is not large enough to contain
-	 * CIP magic, CIP length */
-	if (trash.len < 8)
+	 * CIP magic, header length or
+	 * CIP magic, CIP length, CIP type, header length */
+	if (trash.len < 12)
 		goto missing;
 
 	line = trash.str;
-	hdr_len = ntohl(*(uint32_t *)(line+4));
 
 	/* Decode a possible NetScaler Client IP request, fail early if
 	 * it does not match */
 	if (ntohl(*(uint32_t *)line) != objt_listener(conn->target)->bind_conf->ns_cip_magic)
 		goto bad_magic;
 
+	/* Legacy CIP protocol */
+	if ((trash.str[8] & 0xD0) == 0x40) {
+		hdr_len = ntohl(*(uint32_t *)(line+4));
+		line += 8;
+	}
+	/* Standard CIP protocol */
+	else if (trash.str[8] == 0x00) {
+		hdr_len = ntohs(*(uint32_t *)(line+10));
+		line += 12;
+	}
+	/* Unknown CIP protocol */
+	else {
+		conn->err_code = CO_ER_CIP_BAD_PROTO;
+		goto fail;
+	}
+
 	/* Fail if buffer length is not large enough to contain
-	 * CIP magic, CIP length, minimal IP header */
-	if (trash.len < 28)
+	 * a minimal IP header */
+	if (trash.len < 20)
 		goto missing;
 
-	line += 8;
-
 	/* Get IP version from the first four bits */
 	ip_v = (*line & 0xf0) >> 4;