diff --git a/src/PIL/TiffTags.py b/src/PIL/TiffTags.py
index 469d4def9..89fad7033 100644
--- a/src/PIL/TiffTags.py
+++ b/src/PIL/TiffTags.py
@@ -26,7 +26,7 @@ class _TagInfo(NamedTuple):
     name: str
     type: int | None
     length: int | None
-    enum: dict[int, str] | None
+    enum: dict[str, int]
 
 
 class TagInfo(_TagInfo):