diff --git a/pytiled_parser/map.py b/pytiled_parser/map.py
index 7ec5702..cf85a7e 100644
--- a/pytiled_parser/map.py
+++ b/pytiled_parser/map.py
@@ -11,7 +11,7 @@ from .layer import Layer, RawLayer
 from .properties import Properties, RawProperty
 from .tileset import RawTileSet, TileSet
 
-TileSetDict = Dict[int, TileSet]
+TilesetDict = Dict[int, TileSet]
 
 
 @attr.s(auto_attribs=True)