diff --git a/.changeset/alias-distinct-id-property.md b/.changeset/alias-distinct-id-property.md
new file mode 100644
index 000000000..3bf20da9b
--- /dev/null
+++ b/.changeset/alias-distinct-id-property.md
@@ -0,0 +1,5 @@
+---
+"posthog": patch
+---
+
+fix: include `distinct_id` alongside `alias` in `$create_alias` event properties
diff --git a/posthog/src/main/java/com/posthog/PostHog.kt b/posthog/src/main/java/com/posthog/PostHog.kt
index b74829757..64d0be165 100644
--- a/posthog/src/main/java/com/posthog/PostHog.kt
+++ b/posthog/src/main/java/com/posthog/PostHog.kt
@@ -1319,6 +1319,9 @@ public class PostHog private constructor(
 
         val props = mutableMapOf<String, Any>()
         props["alias"] = alias
+        // The source identity is also duplicated into the properties so consumers that only
+        // read the event properties can resolve both sides of the alias linkage.
+        props["distinct_id"] = distinctId
 
         capture(PostHogEventName.CREATE_ALIAS.event, properties = props)
     }
diff --git a/posthog/src/test/java/com/posthog/PostHogTest.kt b/posthog/src/test/java/com/posthog/PostHogTest.kt
index 2ac6b9ffe..1c81a92d1 100644
--- a/posthog/src/test/java/com/posthog/PostHogTest.kt
+++ b/posthog/src/test/java/com/posthog/PostHogTest.kt
@@ -2008,6 +2008,7 @@ internal class PostHogTest {
         assertEquals("\$create_alias", theEvent.event)
         assertNotNull(theEvent.distinctId)
         assertEquals("theAlias", theEvent.properties!!["alias"] as String)
+        assertEquals(theEvent.distinctId, theEvent.properties!!["distinct_id"] as String)
 
         sut.close()
     }