3 files changed, 12 insertions, 6 deletions
diff --git a/src/script/lua_api/l_areastore.cpp b/src/script/lua_api/l_areastore.cpp
index 261baf6c9..20e7875c7 100644
--- a/src/script/lua_api/l_areastore.cpp
+++ b/src/script/lua_api/l_areastore.cpp
@@ -164,7 +164,7 @@ int LuaAreaStore::l_get_areas_in_area(lua_State *L)
 	return 1;
 }
 
-// insert_area(edge1, edge2, data)
+// insert_area(edge1, edge2, data, id)
 int LuaAreaStore::l_insert_area(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
@@ -179,6 +179,9 @@ int LuaAreaStore::l_insert_area(lua_State *L)
 
 	a.data = std::string(data, d_len);
 
+	if (lua_isnumber(L, 5))
+		a.id = lua_tonumber(L, 5);
+
 	if (!ast->insertArea(&a))
 		return 0;
 
diff --git a/src/util/areastore.cpp b/src/util/areastore.cpp
index 17addb3af..58f08a8c2 100644
--- a/src/util/areastore.cpp
+++ b/src/util/areastore.cpp
@@ -160,7 +160,8 @@ void AreaStore::getAreasForPos(std::vector<Area *> *result, v3s16 pos)
 
 bool VectorAreaStore::insertArea(Area *a)
 {
-	a->id = getNextId();
+	if (a->id == U32_MAX)
+		a->id = getNextId();
 	std::pair<AreaMap::iterator, bool> res =
 			areas_map.insert(std::make_pair(a->id, *a));
 	if (!res.second)
@@ -232,7 +233,8 @@ static inline SpatialIndex::Point get_spatial_point(const v3s16 pos)
 
 bool SpatialAreaStore::insertArea(Area *a)
 {
-	a->id = getNextId();
+	if (a->id == U32_MAX)
+		a->id = getNextId();
 	if (!areas_map.insert(std::make_pair(a->id, *a)).second)
 		// ID is not unique
 		return false;
diff --git a/src/util/areastore.h b/src/util/areastore.h
index ab6bd76a3..bebecfd78 100644
--- a/src/util/areastore.h
+++ b/src/util/areastore.h
@@ -38,9 +38,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 
 struct Area {
-	Area() {}
+	Area() : id(U32_MAX) {}
 	Area(const v3s16 &mine, const v3s16 &maxe) :
-		minedge(mine), maxedge(maxe)
+		id(U32_MAX), minedge(mine), maxedge(maxe)
 	{
 		sortBoxVerticies(minedge, maxedge);
 	}
@@ -68,7 +68,8 @@ public:
 	size_t size() const { return areas_map.size(); }
 
 	/// Add an area to the store.
-	/// Updates the area's ID.
+	/// Updates the area's ID if it hasn't already been set.
+	/// @return Whether the area insertion was successful.
 	virtual bool insertArea(Area *a) = 0;
 
 	/// Removes an area from the store by ID.