diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt
index 1910d09..dda1588 100644
--- a/Documentation/networking/dccp.txt
+++ b/Documentation/networking/dccp.txt
@@ -100,6 +100,10 @@
 seq_window = 100
 	The initial sequence window (sec. 7.5.2).
 
+tx_qlen = 5
+	The size of the transmit buffer in packets. A value of 0 corresponds
+	to an unbounded transmit buffer.
+
 Notes
 =====
 
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 2e8c5ad..61dd99c 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -617,6 +617,7 @@
 	NET_DCCP_DEFAULT_REQ_RETRIES = 7,
 	NET_DCCP_DEFAULT_RETRIES1    = 8,
 	NET_DCCP_DEFAULT_RETRIES2    = 9,
+	NET_DCCP_DEFAULT_TX_QLEN     = 10,
 };
 
 /* /proc/sys/net/ipx */
diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c
index 8b62061..4775ba3 100644
--- a/net/dccp/sysctl.c
+++ b/net/dccp/sysctl.c
@@ -91,6 +91,15 @@
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
+	{
+		.ctl_name	= NET_DCCP_DEFAULT_TX_QLEN,
+		.procname	= "tx_qlen",
+		.data		= &sysctl_dccp_tx_qlen,
+		.maxlen		= sizeof(sysctl_dccp_tx_qlen),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+
 	{ .ctl_name = 0, }
 };