diff --git a/src/v0/destinations/posthog/data/PHAliasConfig.json b/src/v0/destinations/posthog/data/PHAliasConfig.json
index 1992349e22..26fb61ea78 100644
--- a/src/v0/destinations/posthog/data/PHAliasConfig.json
+++ b/src/v0/destinations/posthog/data/PHAliasConfig.json
@@ -1,12 +1,12 @@
 [
   {
-    "destKey": "properties.alias",
+    "destKey": "properties.distinct_id",
     "sourceKeys": "userId",
     "sourceFromGenericMap": true,
     "required": true
   },
   {
-    "destKey": "properties.distinct_id",
+    "destKey": "properties.alias",
     "sourceKeys": "previousId",
     "required": true
   },
diff --git a/test/integrations/destinations/posthog/processor/data.ts b/test/integrations/destinations/posthog/processor/data.ts
index f33aa268b7..35e12b4aab 100644
--- a/test/integrations/destinations/posthog/processor/data.ts
+++ b/test/integrations/destinations/posthog/processor/data.ts
@@ -74,7 +74,7 @@ export const data = [
                     $ip: '0.0.0.0',
                     $timestamp: '2020-11-04T13:21:09.712Z',
                     $anon_distinct_id: 'f3cf54d8-f237-45d2-89f7-ccd70d42cf31',
-                    distinct_id: 'prevId_1',
+                    distinct_id: 'uid-1',
                     $device_manufacturer: 'Xiaomi',
                     $os_version: '8.1.0',
                     $app_version: '1.1.7',
@@ -84,7 +84,7 @@ export const data = [
                     $device_model: 'Redmi 6',
                     $app_namespace: 'com.rudderlabs.javascript',
                     $app_build: '1.0.0',
-                    alias: 'uid-1',
+                    alias: 'prevId_1',
                   },
                   timestamp: '2020-11-04T13:21:09.712Z',
                   event: '$create_alias',
diff --git a/test/integrations/destinations/posthog/router/data.ts b/test/integrations/destinations/posthog/router/data.ts
index dab8ba8b1c..20870670dc 100644
--- a/test/integrations/destinations/posthog/router/data.ts
+++ b/test/integrations/destinations/posthog/router/data.ts
@@ -79,7 +79,7 @@ export const data = [
                       $ip: '0.0.0.0',
                       $timestamp: '2020-11-04T13:21:09.712Z',
                       $anon_distinct_id: 'f3cf54d8-f237-45d2-89f7-ccd70d42cf31',
-                      distinct_id: 'prevId_1',
+                      distinct_id: 'uid-1',
                       $device_manufacturer: 'Xiaomi',
                       $os_version: '8.1.0',
                       $app_version: '1.1.7',
@@ -89,7 +89,7 @@ export const data = [
                       $device_model: 'Redmi 6',
                       $app_namespace: 'com.rudderlabs.javascript',
                       $app_build: '1.0.0',
-                      alias: 'uid-1',
+                      alias: 'prevId_1',
                     },
                     timestamp: '2020-11-04T13:21:09.712Z',
                     event: '$create_alias',