diff --git a/constants.h b/constants.h
index 0d48416..974d519 100644
--- a/constants.h
+++ b/constants.h
@@ -793,3 +793,10 @@ enum RDP_DESKTOP_ORIENTATION
 
 /* [MS-RDPBCGR] 2.2.7.2.7 */
 #define LARGE_POINTER_FLAG_96x96	1
+
+/* [MS-RDPBCGR] TS_SUPPRESS_OUTPUT_PDU allowDisplayUpdates */
+enum RDP_SUPPRESS_STATUS
+{
+	SUPPRESS_DISPLAY_UPDATES = 0x00,
+	ALLOW_DISPLAY_UPDATES = 0x01
+};
diff --git a/proto.h b/proto.h
index 4b88234..33be4be 100644
--- a/proto.h
+++ b/proto.h
@@ -150,7 +150,7 @@ void process_ts_fp_updates(STREAM s);
 void rdp_in_unistr(STREAM s, int in_len, char **string, uint32 * str_size);
 void rdp_send_input(uint32 time, uint16 message_type, uint16 device_flags, uint16 param1,
 		    uint16 param2);
-void rdp_send_client_window_status(int status);
+void rdp_send_suppress_output_pdu(enum RDP_SUPPRESS_STATUS allowupdates);
 void process_colour_pointer_pdu(STREAM s);
 void process_new_pointer_pdu(STREAM s);
 void process_cached_pointer_pdu(STREAM s);
diff --git a/rdp.c b/rdp.c
index 21788f3..4210af6 100644
--- a/rdp.c
+++ b/rdp.c
@@ -532,35 +532,37 @@ rdp_send_input(uint32 time, uint16 message_type, uint16 device_flags, uint16 par
 	rdp_send_data(s, RDP_DATA_PDU_INPUT);
 }
 
-/* Send a client window information PDU */
+/* Send a Suppress Output PDU */
 void
-rdp_send_client_window_status(int status)
+rdp_send_suppress_output_pdu(enum RDP_SUPPRESS_STATUS allowupdates)
 {
 	STREAM s;
 	static int current_status = 1;
 
-	if (current_status == status)
+	if (current_status == allowupdates)
 		return;
 
 	s = rdp_init_data(12);
 
-	out_uint32_le(s, status);
+	out_uint8(s, allowupdates);	/* allowDisplayUpdates */
+	out_uint8s(s, 3);	/* pad3Octets */
 
-	switch (status)
+	switch (allowupdates)
 	{
-		case 0:	/* shut the server up */
+		case SUPPRESS_DISPLAY_UPDATES:	/* shut the server up */
 			break;
 
-		case 1:	/* receive data again */
-			out_uint32_le(s, 0);	/* unknown */
-			out_uint16_le(s, g_width);
-			out_uint16_le(s, g_height);
+		case ALLOW_DISPLAY_UPDATES:	/* receive data again */
+			out_uint16_le(s, 0);		/* left */
+			out_uint16_le(s, 0);		/* top */
+			out_uint16_le(s, g_width);	/* right */
+			out_uint16_le(s, g_height);	/* bottom */
 			break;
 	}
 
 	s_mark_end(s);
 	rdp_send_data(s, RDP_DATA_PDU_CLIENT_WINDOW_STATUS);
-	current_status = status;
+	current_status = allowupdates;
 }
 
 /* Send persistent bitmap cache enumeration PDU's */
diff --git a/xwin.c b/xwin.c
index 9452349..6282e98 100644
--- a/xwin.c
+++ b/xwin.c
@@ -2670,11 +2670,11 @@ xwin_process_events(void)
 				break;
 			case MapNotify:
 				if (!g_seamless_active)
-					rdp_send_client_window_status(1);
+					rdp_send_suppress_output_pdu(ALLOW_DISPLAY_UPDATES);
 				break;
 			case UnmapNotify:
 				if (!g_seamless_active)
-					rdp_send_client_window_status(0);
+					rdp_send_suppress_output_pdu(SUPPRESS_DISPLAY_UPDATES);
 				break;
 			case ConfigureNotify:
 #ifdef HAVE_XRANDR