diff --git a/source/games/sw/src/sector.cpp b/source/games/sw/src/sector.cpp
index 07c2dd56a..954e387d2 100644
--- a/source/games/sw/src/sector.cpp
+++ b/source/games/sw/src/sector.cpp
@@ -2242,7 +2242,7 @@ void PlayerOperateEnv(PLAYER* pp)
                         pp->KeyPressBits &= ~SB_OPEN;
 
                         // crude and very awful hack for wd secret area
-                        if (pp->cursector == &sector[491] && currentLevel->levelNumber == 11 && sector[715].lotag == TAG_SECRET_AREA_TRIGGER) 
+                        if  (sector.Size() > 715 && pp->cursector == &sector[491] && currentLevel->levelNumber == 11 && sector[715].lotag == TAG_SECRET_AREA_TRIGGER) 
                         {
                             TriggerSecret(&sector[715], pp);
                         }