diff --git a/Source/objects.cpp b/Source/objects.cpp
index 82bd011d0..01734a9f3 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -763,7 +763,7 @@ void objects_454AF0(int a1, int a2, int a3)
 {
 	objects_44D8C5(86, a1, a2, a3);
 }
-#endif
+#endif
 
 void AddStoryBooks()
 {
@@ -1618,7 +1618,7 @@ void objects_44DA68(int i, int a2)
 		object[i]._oVar8 = 0;
 	}
 }
-#endif
+#endif
 
 void AddObject(int ot, int ox, int oy)
 {
@@ -2848,7 +2848,7 @@ void ObjChangeMapResync(int x1, int y1, int x2, int y2)
 	}
 }
 
-void OperateL1Door(int pnum, int i, BOOL sendflag)
+void OperateL1Door(int pnum, int i, DIABOOL sendflag)
 {
 	int dpx, dpy;
 
@@ -3184,7 +3184,7 @@ void OperateInnSignChest(int pnum, int i)
 	}
 }
 
-void OperateSlainHero(int pnum, int i, BOOL sendmsg)
+void OperateSlainHero(int pnum, int i, DIABOOL sendmsg)
 {
 	if (object[i]._oSelFlag != 0) {
 		object[i]._oSelFlag = 0;
@@ -3274,7 +3274,7 @@ void OperateSarc(int pnum, int i, DIABOOL sendmsg)
 	}
 }
 
-void OperateL2Door(int pnum, int i, BOOL sendflag)
+void OperateL2Door(int pnum, int i, DIABOOL sendflag)
 {
 	int dpx, dpy;
 
@@ -3286,7 +3286,7 @@ void OperateL2Door(int pnum, int i, BOOL sendflag)
 		OperateL2RDoor(pnum, i, sendflag);
 }
 
-void OperateL3Door(int pnum, int i, BOOL sendflag)
+void OperateL3Door(int pnum, int i, DIABOOL sendflag)
 {
 	int dpx, dpy;
 
diff --git a/Source/objects.h b/Source/objects.h
index 9da56e3e2..c0c4e3974 100644
--- a/Source/objects.h
+++ b/Source/objects.h
@@ -114,14 +114,14 @@ void DoorSet(int oi, int dx, int dy);
 void RedoPlayerVision();
 void OperateL1RDoor(int pnum, int oi, DIABOOL sendflag);
 void OperateL1LDoor(int pnum, int oi, DIABOOL sendflag);
-void OperateL2RDoor(int pnum, int oi, BOOL sendflag);
+void OperateL2RDoor(int pnum, int oi, DIABOOL sendflag);
 void OperateL2LDoor(int pnum, int oi, BOOL sendflag);
-void OperateL3RDoor(int pnum, int oi, BOOL sendflag);
-void OperateL3LDoor(int pnum, int oi, BOOL sendflag);
+void OperateL3RDoor(int pnum, int oi, DIABOOL sendflag);
+void OperateL3LDoor(int pnum, int oi, DIABOOL sendflag);
 void MonstCheckDoors(int m);
 void ObjChangeMap(int x1, int y1, int x2, int y2);
 void ObjChangeMapResync(int x1, int y1, int x2, int y2);
-void OperateL1Door(int pnum, int i, BOOL sendflag);
+void OperateL1Door(int pnum, int i, DIABOOL sendflag);
 void OperateLever(int pnum, int i);
 void OperateBook(int pnum, int i);
 void OperateBookLever(int pnum, int i);
@@ -129,11 +129,11 @@ void OperateSChambBk(int pnum, int i);
 void OperateChest(int pnum, int i, DIABOOL sendmsg);
 void OperateMushPatch(int pnum, int i);
 void OperateInnSignChest(int pnum, int i);
-void OperateSlainHero(int pnum, int i, BOOL sendmsg);
+void OperateSlainHero(int pnum, int i, DIABOOL sendmsg);
 void OperateTrapLvr(int i);
 void OperateSarc(int pnum, int i, DIABOOL sendmsg);
-void OperateL2Door(int pnum, int i, BOOL sendflag);
-void OperateL3Door(int pnum, int i, BOOL sendflag);
+void OperateL2Door(int pnum, int i, DIABOOL sendflag);
+void OperateL3Door(int pnum, int i, DIABOOL sendflag);
 void OperatePedistal(int pnum, int i);
 void TryDisarm(int pnum, int i);
 int ItemMiscIdIdx(int imiscid);