diff --git a/sentry_sdk/_types.py b/sentry_sdk/_types.py
index fd0747eef3..9f7546e81b 100644
--- a/sentry_sdk/_types.py
+++ b/sentry_sdk/_types.py
@@ -19,6 +19,7 @@
     from typing import Dict
     from typing import List
     from typing import Mapping
+    from typing import NotRequired
     from typing import Optional
     from typing import Tuple
     from typing import Type
@@ -63,7 +64,7 @@
         "MeasurementValue",
         {
             "value": float,
-            "unit": Optional[MeasurementUnit],
+            "unit": NotRequired[Optional[MeasurementUnit]],
         },
     )