diff --git a/nas.js b/nas.js
index 6e0685c..b012f0f 100644
--- a/nas.js
+++ b/nas.js
@@ -43,8 +43,11 @@ function impressionsPerCredit(type) {
   return type === 'banner' ? 5 : type === 'text' ? 10 : type === 'video' ? 0 : 0;
 }
 function nasKind(type) {
-  if (type === 'banner') return { pid: 2, adtype: 'banner' };
-  if (type === 'text') return { pid: 1, adtype: 'text' };
+  // pid encodes text(1)/banner(2); adtype is a separate small int — 1 is the
+  // value the overwhelming majority of live NAS rows use for both formats.
+  const adtype = Number(process.env.NAS_ADTYPE || 1);
+  if (type === 'banner') return { pid: 2, adtype };
+  if (type === 'text') return { pid: 1, adtype };
   return null; // only banner/text syndicate to NAS in v1 (login/solo/video are IAP-native)
 }