diff --git a/src/lang/polish.txt b/src/lang/polish.txt
--- a/src/lang/polish.txt
+++ b/src/lang/polish.txt
@@ -4957,8 +4957,6 @@ STR_TIMETABLE_EXPECTED                  
 STR_TIMETABLE_SCHEDULED                                         :{BLACK}Zaplanowany
 STR_TIMETABLE_EXPECTED_TOOLTIP                                  :{BLACK}Przełącz między spodziewanymi i zaplanowanymi
 
-STR_TIMETABLE_ARRIVAL_ABBREVIATION                              :P:
-STR_TIMETABLE_DEPARTURE_ABBREVIATION                            :O:
 
 
 # Date window (for timetable)