diff --git a/.changeset/metal-beds-shout.md b/.changeset/metal-beds-shout.md
new file mode 100644
index 000000000..bbfe2fd8c
--- /dev/null
+++ b/.changeset/metal-beds-shout.md
@@ -0,0 +1,5 @@
+---
+'@segment/analytics-core': patch
+---
+
+expose BaseUserTraits
diff --git a/packages/core/src/events/interfaces.ts b/packages/core/src/events/interfaces.ts
index 1f1f7117c..5cde06743 100644
--- a/packages/core/src/events/interfaces.ts
+++ b/packages/core/src/events/interfaces.ts
@@ -362,7 +362,7 @@ type BaseGroupTraits = DeepNullable<{
  * This interface represents reserved traits that Segment has standardized.
  * @link https://segment.com/docs/connections/spec/identify/#traits
  */
-type BaseUserTraits = DeepNullable<{
+export type BaseUserTraits = DeepNullable<{
   /**
    * Unique ID in your database for a user
    */