diff --git a/toy-impl/top_level.py b/toy-impl/top_level.py
index fbd18b5..b663a33 100644
--- a/toy-impl/top_level.py
+++ b/toy-impl/top_level.py
@@ -7,7 +7,7 @@ def parse_type(ctx: Context, ty):
     if ty is None:
         return None, set()
     elif isinstance(ty, ast.Name):
-        # we should support string either, but no need for toy implementaiton
+        # we should support string either, but no need for toy implementation
         if ty.id in ctx.types:
             return ctx.types[ty.id], set()
         elif ty.id in ctx.variables: