diff --git a/doc/config.but b/doc/config.but
index f258a356..9770697d 100644
--- a/doc/config.but
+++ b/doc/config.but
@@ -4071,7 +4071,7 @@ at the bottom of the screen, until a space is typed.
 
 \S{supdup-scroll} \q{Terminal scrolling}
 
-This controls whether the terminal will perform scrolling then the
+This controls whether the terminal will perform scrolling when the
 cursor goes below the last line, or if the cursor will return to the
 first line.