diff --git a/doc/terminatorrc.5 b/doc/terminatorrc.5
index 104c16d9..4f713b23 100644
--- a/doc/terminatorrc.5
+++ b/doc/terminatorrc.5
@@ -23,7 +23,7 @@ Default colour of terminal background, as a colour specification (can be HTML-st
 Default value: \fB#000000\fR
 .TP 
 .B background_darkness 
-A value between 0.0 and 1.0 indicating how much to darken the background image. 0.0 means no darkness, 1.0 means fully dark. In the current implementation, there are only two levels of darkness possible, so the setting behaves as a boolean, where 0.0 disables the darkening effect. 
+A value between 0.0 and 1.0 indicating how much to darken the background image. 0.0 means no darkness, 1.0 means fully dark. If the terminal is set to transparent, this setting controls how transparent it is. 0.0 means fully transparent, 1.0 means fully opaque. 
 Default value: \fB0.5\fR
 .TP 
 .B background_type