diff --git a/core/java/android/content/AttributionSource.java b/core/java/android/content/AttributionSource.java
index 1dda6374a4747..1a8de7722a695 100644
--- a/core/java/android/content/AttributionSource.java
+++ b/core/java/android/content/AttributionSource.java
@@ -148,6 +148,10 @@ public final class AttributionSource implements Parcelable {
 
     AttributionSource(@NonNull Parcel in) {
         this(AttributionSourceState.CREATOR.createFromParcel(in));
+
+        // Since we just unpacked this object as part of it transiting a Binder
+        // call, this is the perfect time to enforce that its UID can be trusted
+        enforceCallingUid();
     }
 
     /** @hide */