diff --git a/src/main/resources/bidder-config/mobilefuse.yaml b/src/main/resources/bidder-config/mobilefuse.yaml
index ea6645feb96..1b19ad00606 100644
--- a/src/main/resources/bidder-config/mobilefuse.yaml
+++ b/src/main/resources/bidder-config/mobilefuse.yaml
@@ -16,3 +16,13 @@ adapters:
       site-media-types:
       supported-vendors:
       vendor-id: 909
+      usersync:
+        cookie-family-name: mobilefuse
+        iframe:
+          url: https://mfx.mobilefuse.com/usync?us_privacy={{us_privacy}}&pxurl={{redirect_url}}
+          support-cors: false
+          uid-macro: '$UID'
+        redirect:
+          url: https://mfx.mobilefuse.com/getuid?us_privacy={{us_privacy}}&redir={{redirect_url}}
+          support-cors: false
+          uid-macro: '$UID'
diff --git a/src/main/resources/bidder-config/nextmillennium.yaml b/src/main/resources/bidder-config/nextmillennium.yaml
index a66930c248b..67c34ae62d4 100644
--- a/src/main/resources/bidder-config/nextmillennium.yaml
+++ b/src/main/resources/bidder-config/nextmillennium.yaml
@@ -21,4 +21,4 @@ adapters:
       redirect:
         url: https://cookies.nextmillmedia.com/sync?type=image&gdpr={{gdpr}}&gdpr_consent={{gdpr_consent}}&us_privacy={{us_privacy}}&redirect={{redirect_url}}
         support-cors: false
-        userMacro: '[NMUID]'
+        uid-macro: '[NMUID]'