diff --git a/src/script/api/script_tile.cpp b/src/script/api/script_tile.cpp
index 90276de8d4..a1be12e084 100644
--- a/src/script/api/script_tile.cpp
+++ b/src/script/api/script_tile.cpp
@@ -48,7 +48,7 @@
 /* static */ bool ScriptTile::IsBuildableRectangle(TileIndex tile, SQInteger width, SQInteger height)
 {
 	/* Check whether we can extract valid X and Y */
-	if (!::IsValidTile(tile) || width < 0 || height < 0) return false;
+	if (!::IsValidTile(tile) || width < 1 || height < 1) return false;
 
 	uint tx = ScriptMap::GetTileX(tile);
 	uint ty = ScriptMap::GetTileY(tile);
diff --git a/src/script/api/script_tile.hpp b/src/script/api/script_tile.hpp
index dc41f74822..515c3208fe 100644
--- a/src/script/api/script_tile.hpp
+++ b/src/script/api/script_tile.hpp
@@ -157,8 +157,8 @@ public:
 	 * @param width The width of the rectangle.
 	 * @param height The height of the rectangle.
 	 * @pre ScriptMap::IsValidTile(tile).
-	 * @pre width >= 0.
-	 * @pre height >= 0.
+	 * @pre width > 0.
+	 * @pre height > 0.
 	 * @return True if it is buildable, false if not.
 	 */
 	static bool IsBuildableRectangle(TileIndex tile, SQInteger width, SQInteger height);