diff --git a/src/v0/destinations/facebook_conversions/utils.js b/src/v0/destinations/facebook_conversions/utils.js
index 24d0ddc9c2a..270fac8c455 100644
--- a/src/v0/destinations/facebook_conversions/utils.js
+++ b/src/v0/destinations/facebook_conversions/utils.js
@@ -177,7 +177,7 @@ const fetchAppData = (message) => {
   const appData = constructPayload(
     message,
     MAPPING_CONFIG[CONFIG_CATEGORIES.APPDATA.name],
-    'fb_pixel',
+    DESTINATION.toLowerCase(),
   );
 
   if (appData) {
@@ -195,6 +195,10 @@ const fetchAppData = (message) => {
     appData.extinfo[0] = sourceSDK;
   }
 
+  appData.extinfo = ['', '', '', '', '', '', '', '', '', '', '', '', '', '', '', ''].map(
+    (val, ind) => (appData.extinfo[ind] ? appData.extinfo[ind] : val),
+  );
+
   return appData;
 };