diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -5110,6 +5110,7 @@ STR_ERROR_NO_BUOY                       
 STR_ERROR_CAN_T_TIMETABLE_VEHICLE                               :{WHITE}Can't timetable vehicle...
 STR_ERROR_TIMETABLE_ONLY_WAIT_AT_STATIONS                       :{WHITE}Vehicles can only wait at stations
 STR_ERROR_TIMETABLE_NOT_STOPPING_HERE                           :{WHITE}This vehicle is not stopping at this station
+STR_ERROR_TIMETABLE_INCOMPLETE                                  :{WHITE}... timetable is incomplete
 
 # Sign related errors
 STR_ERROR_TOO_MANY_SIGNS                                        :{WHITE}... too many signs