diff --git a/src/game_mouse.cc b/src/game_mouse.cc
index 492b53b..bafbf82 100644
--- a/src/game_mouse.cc
+++ b/src/game_mouse.cc
@@ -1977,11 +1977,11 @@ int gameMouseObjectsInit()
 
     gGameMouseBouncingCursor->flags |= OBJECT_LIGHT_THRU;
     gGameMouseBouncingCursor->flags |= OBJECT_TEMPORARY;
-    gGameMouseBouncingCursor->flags |= OBJECT_FLAG_0x400;
+    gGameMouseBouncingCursor->flags |= OBJECT_NO_REMOVE;
     gGameMouseBouncingCursor->flags |= OBJECT_SHOOT_THRU;
     gGameMouseBouncingCursor->flags |= OBJECT_NO_BLOCK;
 
-    gGameMouseHexCursor->flags |= OBJECT_FLAG_0x400;
+    gGameMouseHexCursor->flags |= OBJECT_NO_REMOVE;
     gGameMouseHexCursor->flags |= OBJECT_TEMPORARY;
     gGameMouseHexCursor->flags |= OBJECT_LIGHT_THRU;
     gGameMouseHexCursor->flags |= OBJECT_SHOOT_THRU;
diff --git a/src/obj_types.h b/src/obj_types.h
index 158d789..02d9e7f 100644
--- a/src/obj_types.h
+++ b/src/obj_types.h
@@ -48,7 +48,13 @@ typedef enum ObjectFlags {
     OBJECT_FLAT = 0x08,
     OBJECT_NO_BLOCK = 0x10,
     OBJECT_LIGHTING = 0x20,
-    OBJECT_FLAG_0x400 = 0x400, // ???
+
+    // Specifies that the object should not be removed (freed) from the game
+    // world for whatever reason.
+    //
+    // This flag is used to prevent freeing of system objects like dude, egg,
+    // mouse cursors, etc.
+    OBJECT_NO_REMOVE = 0x400,
     OBJECT_MULTIHEX = 0x800,
     OBJECT_NO_HIGHLIGHT = 0x1000,
     OBJECT_QUEUED = 0x2000, // set if there was/is any event for the object
diff --git a/src/object.cc b/src/object.cc
index 4df1512..01ea0ed 100644
--- a/src/object.cc
+++ b/src/object.cc
@@ -336,7 +336,7 @@ int objectsInit(unsigned char* buf, int width, int height, int pitch)
     dudeFid = buildFid(OBJ_TYPE_CRITTER, _art_vault_guy_num, 0, 0, 0);
     objectCreateWithFidPid(&gDude, dudeFid, 0x1000000);
 
-    gDude->flags |= OBJECT_FLAG_0x400;
+    gDude->flags |= OBJECT_NO_REMOVE;
     gDude->flags |= OBJECT_TEMPORARY;
     gDude->flags |= OBJECT_HIDDEN;
     gDude->flags |= OBJECT_LIGHT_THRU;
@@ -349,7 +349,7 @@ int objectsInit(unsigned char* buf, int width, int height, int pitch)
 
     eggFid = buildFid(OBJ_TYPE_INTERFACE, 2, 0, 0, 0);
     objectCreateWithFidPid(&gEgg, eggFid, -1);
-    gEgg->flags |= OBJECT_FLAG_0x400;
+    gEgg->flags |= OBJECT_NO_REMOVE;
     gEgg->flags |= OBJECT_TEMPORARY;
     gEgg->flags |= OBJECT_HIDDEN;
     gEgg->flags |= OBJECT_LIGHT_THRU;
@@ -385,8 +385,8 @@ void objectsReset()
 void objectsExit()
 {
     if (gObjectsInitialized) {
-        gDude->flags &= ~OBJECT_FLAG_0x400;
-        gEgg->flags &= ~OBJECT_FLAG_0x400;
+        gDude->flags &= ~OBJECT_NO_REMOVE;
+        gEgg->flags &= ~OBJECT_NO_REMOVE;
 
         _obj_remove_all();
         textObjectsFree();
@@ -540,8 +540,8 @@ static int objectLoadAllInternal(File* stream)
 
             _obj_insert(objectListNode);
 
-            if ((objectListNode->obj->flags & OBJECT_FLAG_0x400) && PID_TYPE(objectListNode->obj->pid) == OBJ_TYPE_CRITTER && objectListNode->obj->pid != 18000) {
-                objectListNode->obj->flags &= ~OBJECT_FLAG_0x400;
+            if ((objectListNode->obj->flags & OBJECT_NO_REMOVE) && PID_TYPE(objectListNode->obj->pid) == OBJ_TYPE_CRITTER && objectListNode->obj->pid != 18000) {
+                objectListNode->obj->flags &= ~OBJECT_NO_REMOVE;
             }
 
             Inventory* inventory = &(objectListNode->obj->data.inventory);
@@ -2047,7 +2047,7 @@ int _obj_inven_free(Inventory* inventory)
         objectListNodeCreate(&node);
 
         node->obj = inventoryItem->item;
-        node->obj->flags &= ~OBJECT_FLAG_0x400;
+        node->obj->flags &= ~OBJECT_NO_REMOVE;
         _obj_remove(node, node);
 
         inventoryItem->item = NULL;
@@ -3716,7 +3716,7 @@ int _obj_load_dude(File* stream)
     tempInventory->capacity = 0;
     tempInventory->items = NULL;
 
-    temp->flags &= ~OBJECT_FLAG_0x400;
+    temp->flags &= ~OBJECT_NO_REMOVE;
 
     if (objectDestroy(temp, NULL) == -1) {
         debugPrint("\nError: obj_load_dude: Can't destroy temp object!\n");
@@ -3931,7 +3931,7 @@ static int _obj_remove(ObjectListNode* a1, ObjectListNode* a2)
         return -1;
     }
 
-    if ((a1->obj->flags & OBJECT_FLAG_0x400) != 0) {
+    if ((a1->obj->flags & OBJECT_NO_REMOVE) != 0) {
         return -1;
     }
 
diff --git a/src/party_member.cc b/src/party_member.cc
index c5787ae..3425ba3 100644
--- a/src/party_member.cc
+++ b/src/party_member.cc
@@ -395,7 +395,7 @@ int partyMemberAdd(Object* object)
     partyMember->vars = NULL;
 
     object->id = (object->pid & 0xFFFFFF) + 18000;
-    object->flags |= (OBJECT_FLAG_0x400 | OBJECT_TEMPORARY);
+    object->flags |= (OBJECT_NO_REMOVE | OBJECT_TEMPORARY);
 
     gPartyMembersLength++;
 
@@ -453,7 +453,7 @@ int partyMemberRemove(Object* object)
         gPartyMembers[index].object = gPartyMembers[gPartyMembersLength - 1].object;
     }
 
-    object->flags &= ~(OBJECT_FLAG_0x400 | OBJECT_TEMPORARY);
+    object->flags &= ~(OBJECT_NO_REMOVE | OBJECT_TEMPORARY);
 
     gPartyMembersLength--;
 
@@ -482,7 +482,7 @@ int _partyMemberPrepSave()
         STRUCT_519DA8* ptr = &(gPartyMembers[index]);
 
         if (index > 0) {
-            ptr->object->flags &= ~(OBJECT_FLAG_0x400 | OBJECT_TEMPORARY);
+            ptr->object->flags &= ~(OBJECT_NO_REMOVE | OBJECT_TEMPORARY);
         }
 
         Script* script;
@@ -501,7 +501,7 @@ int _partyMemberUnPrepSave()
         STRUCT_519DA8* ptr = &(gPartyMembers[index]);
 
         if (index > 0) {
-            ptr->object->flags |= (OBJECT_FLAG_0x400 | OBJECT_TEMPORARY);
+            ptr->object->flags |= (OBJECT_NO_REMOVE | OBJECT_TEMPORARY);
         }
 
         Script* script;