diff --git a/Source/objects.cpp b/Source/objects.cpp
index 7ff7acdae..c923c8ddb 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -308,6 +308,8 @@ bool RndLocOk(int xp, int yp)
 
 bool CanPlaceWallTrap(int xp, int yp)
 {
+	if (dObject[xp][yp] != 0)
+		return false;
 	if (TileContainsSetPiece({ xp, yp }))
 		return false;