diff --git a/.changeset/rude-apples-bow.md b/.changeset/rude-apples-bow.md
new file mode 100644
index 00000000..a44d6e6f
--- /dev/null
+++ b/.changeset/rude-apples-bow.md
@@ -0,0 +1,5 @@
+---
+"@cloudflare/workers-types": patch
+---
+
+Fix DurableObject transaction `get` to properly return `Promise<T | undefined>` instead of `Promise<T>`
diff --git a/overrides/durableobjects.d.ts b/overrides/durableobjects.d.ts
index f73bbe15..05b391af 100644
--- a/overrides/durableobjects.d.ts
+++ b/overrides/durableobjects.d.ts
@@ -50,7 +50,7 @@ declare abstract class DurableObjectStorage {
 }
 
 declare abstract class DurableObjectTransaction {
-  get<T = unknown>(key: string, options?: DurableObjectGetOptions): Promise<T>;
+  get<T = unknown>(key: string, options?: DurableObjectGetOptions): Promise<T | undefined>;
   get<T = unknown>(
     keys: string[],
     options?: DurableObjectGetOptions