diff --git a/doc/rdesktop.1 b/doc/rdesktop.1
index 5d3d88e..68f2139 100644
--- a/doc/rdesktop.1
+++ b/doc/rdesktop.1
@@ -122,7 +122,7 @@ disabled. For this to work, you must specify the correct button
 size, in pixels. The special word "standard" means 18 pixels. 
 .TP
 .BR "-T <title>"
-Sets the window title.
+Sets the window title. The title must be specified using an UTF-8 string. 
 .TP
 .BR "-N"
 Enable numlock syncronization between the Xserver and the remote RDP