diff --git a/Source/objects.cpp b/Source/objects.cpp
index d0bd54ca9..a0ea49f0c 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -1631,7 +1631,7 @@ void Obj_FlameTrap(int i)
 void Obj_Trap(int i)
 {
 	int oti, dir;
-	BOOL otrig;
+	BOOLEAN otrig;
 	int sx, sy, dx, dy, x, y;
 
 	otrig = FALSE;