diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index 1519704f0200d..5729bec7a5f51 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -1320,15 +1320,12 @@ def visit(self, node: ast3.expr) -> ProperType: ...
     def visit(self, node: Optional[AST]) -> Optional[ProperType]: ...
 
     @overload
-    def visit(self, node: ast3.expr,
-              is_type_comment: Optional[bool]) -> ProperType: ...
+    def visit(self, node: ast3.expr, is_type_comment: bool) -> ProperType: ...
 
     @overload
-    def visit(self, node: Optional[AST],
-              is_type_comment: Optional[bool]) -> Optional[ProperType]: ...
+    def visit(self, node: Optional[AST], is_type_comment: bool) -> Optional[ProperType]: ...
 
-    def visit(self, node: Optional[AST],
-              is_type_comment: Optional[bool] = False) -> Optional[ProperType]:
+    def visit(self, node: Optional[AST], is_type_comment: bool = False) -> Optional[ProperType]:
         """Modified visit -- keep track of the stack of nodes"""
         if node is None:
             return None