diff --git a/include/linux/if_pppol2tp.h b/include/linux/if_pppol2tp.h
index 23cefa1..b477541 100644
--- a/include/linux/if_pppol2tp.h
+++ b/include/linux/if_pppol2tp.h
@@ -19,10 +19,11 @@
 
 #ifdef __KERNEL__
 #include <linux/in.h>
+#include <linux/in6.h>
 #endif
 
 /* Structure used to connect() the socket to a particular tunnel UDP
- * socket.
+ * socket over IPv4.
  */
 struct pppol2tp_addr {
 	__kernel_pid_t	pid;		/* pid that owns the fd.
@@ -35,6 +36,20 @@
 	__u16 d_tunnel, d_session;	/* For sending outgoing packets */
 };
 
+/* Structure used to connect() the socket to a particular tunnel UDP
+ * socket over IPv6.
+ */
+struct pppol2tpin6_addr {
+	__kernel_pid_t	pid;		/* pid that owns the fd.
+					 * 0 => current */
+	int	fd;			/* FD of UDP socket to use */
+
+	__u16 s_tunnel, s_session;	/* For matching incoming packets */
+	__u16 d_tunnel, d_session;	/* For sending outgoing packets */
+
+	struct sockaddr_in6 addr;	/* IP address and port to send to */
+};
+
 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
  * bits. So we need a different sockaddr structure.
  */
@@ -49,6 +64,17 @@
 	__u32 d_tunnel, d_session;	/* For sending outgoing packets */
 };
 
+struct pppol2tpv3in6_addr {
+	__kernel_pid_t	pid;		/* pid that owns the fd.
+					 * 0 => current */
+	int	fd;			/* FD of UDP or IP socket to use */
+
+	__u32 s_tunnel, s_session;	/* For matching incoming packets */
+	__u32 d_tunnel, d_session;	/* For sending outgoing packets */
+
+	struct sockaddr_in6 addr;	/* IP address and port to send to */
+};
+
 /* Socket options:
  * DEBUG	- bitmask of debug message categories
  * SENDSEQ	- 0 => don't send packets with sequence numbers