diff --git a/lang/danish.txt b/lang/danish.txt
index d2b9cff73f..dc4a79ee95 100644
--- a/lang/danish.txt
+++ b/lang/danish.txt
@@ -887,6 +887,8 @@ STR_OPTIONS_LANG						:{BLACK}Sprog
 STR_OPTIONS_LANG_CBO						:{BLACK}{SKIP}{SKIP}{SKIP}{SKIP}{SKIP}{SKIP}{STRING}
 STR_OPTIONS_LANG_TIP						:{BLACK}Vælg sprog til brugerfladen
 
+STR_OPTIONS_FULLSCREEN						:{BLACK}Fuld skærm
+STR_OPTIONS_FULLSCREEN_TIP					:{BLACK}Afkryds for at spille OpenTTD i fuld skærm
 
 STR_OPTIONS_RES							:{BLACK}Skærmopløsning
 STR_OPTIONS_RES_CBO						:{BLACK}{SKIP}{SKIP}{SKIP}{SKIP}{SKIP}{SKIP}{SKIP}{STRING}