diff --git a/proto.h b/proto.h
index 5762cf0..6ac2416 100644
--- a/proto.h
+++ b/proto.h
@@ -289,6 +289,7 @@ BOOL seamless_init(void);
 void seamless_send_sync(void);
 void seamless_send_state(unsigned long id, unsigned int state, unsigned long flags);
 void seamless_send_zchange(unsigned long id, unsigned long below, unsigned long flags);
+void seamless_send_focus(unsigned long id, unsigned long flags);
 
 /* *INDENT-OFF* */
 #ifdef __cplusplus
diff --git a/seamless.c b/seamless.c
index 0eb2893..b407f54 100644
--- a/seamless.c
+++ b/seamless.c
@@ -347,3 +347,13 @@ seamless_send_zchange(unsigned long id, unsigned long below, unsigned long flags
 
 	seamless_send("ZCHANGE,0x%08lx,0x%08lx,0x%lx\n", id, below, flags);
 }
+
+
+void
+seamless_send_focus(unsigned long id, unsigned long flags)
+{
+	if (!g_seamless_rdp)
+		return;
+
+	seamless_send("FOCUS,0x%08lx,0x%lx\n", id, flags);
+}
diff --git a/xwin.c b/xwin.c
index 423ecde..40bf85b 100644
--- a/xwin.c
+++ b/xwin.c
@@ -1912,6 +1912,12 @@ xwin_process_events(void)
 				if (g_grab_keyboard && g_mouse_in_wnd)
 					XGrabKeyboard(g_display, g_wnd, True,
 						      GrabModeAsync, GrabModeAsync, CurrentTime);
+
+				sw = seamless_get_window_by_wnd(xevent.xfocus.window);
+				if (!sw)
+					break;
+
+				seamless_send_focus(sw->id, 0);
 				break;
 
 			case FocusOut: