diff --git a/third_party/3/typed_ast/ast27.pyi b/third_party/3/typed_ast/ast27.pyi
index 28e0dfee3c1c..c4bf4f6b8c35 100644
--- a/third_party/3/typed_ast/ast27.pyi
+++ b/third_party/3/typed_ast/ast27.pyi
@@ -242,7 +242,7 @@ class Repr(expr):
     value = ...  # type: expr
 
 class Num(expr):
-    n = ...  # type: Union[int, float]
+    n = ...  # type: Union[int, float, complex]
 
 class Str(expr):
     s = ...  # type: bytes