diff --git a/data/language/en-US.txt b/data/language/en-US.txt
index a43c08351e..b3a4dea438 100644
--- a/data/language/en-US.txt
+++ b/data/language/en-US.txt
@@ -242,4 +242,6 @@ STR_6630    :This setting will align the toolbar buttons horizontally in the cen
 STR_6661    :Randomize all
 STR_6662    :Randomize colors for every train or vehicle
 
+STR_6670    :Guest behavior
+
 STR_6732    :Show a button in the toolbar to rotate the view counterclockwise