diff --git a/spacy/tokens/doc.pyi b/spacy/tokens/doc.pyi
index a40fa74aa..ec0bd8534 100644
--- a/spacy/tokens/doc.pyi
+++ b/spacy/tokens/doc.pyi
@@ -1,7 +1,7 @@
 from typing import Callable, Protocol, Iterable, Iterator, Optional
 from typing import Union, Tuple, List, Dict, Any, overload
 from cymem.cymem import Pool
-from thinc.types import Floats1d, Floats2d, Ints2d
+from thinc.types import ArrayXd, Floats1d, Floats2d, Ints2d
 from .span import Span
 from .token import Token
 from ._dict_proxies import SpanGroups
@@ -22,6 +22,7 @@ class Doc:
     max_length: int
     length: int
     sentiment: float
+    activations: Dict[str, Dict[str, ArrayXd]]
     cats: Dict[str, float]
     user_hooks: Dict[str, Callable[..., Any]]
     user_token_hooks: Dict[str, Callable[..., Any]]