diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -2674,6 +2674,7 @@ STR_STATION_CLASS_WAYP                  
 
 # Signal window
 STR_BUILD_SIGNAL_CAPTION                                        :{WHITE}Signal Selection
+STR_BUILD_SIGNAL_TOGGLE_ADVANCED_SIGNAL_TOOLTIP                 :{BLACK}Toggle showing advanced signal types
 STR_BUILD_SIGNAL_SEMAPHORE_NORM_TOOLTIP                         :{BLACK}Block Signal (semaphore){}This is the most basic type of signal, allowing only one train to be in the same block at the same time
 STR_BUILD_SIGNAL_SEMAPHORE_ENTRY_TOOLTIP                        :{BLACK}Entry Signal (semaphore){}Green as long as there is one or more green exit-signal from the following section of track. Otherwise it shows red
 STR_BUILD_SIGNAL_SEMAPHORE_EXIT_TOOLTIP                         :{BLACK}Exit Signal (semaphore){}Behaves in the same way as a block signal but is necessary to trigger the correct colour on entry & combo pre-signals