diff --git a/src/data/newGamePlus.js b/src/data/newGamePlus.js
index d9da080e93330e3e7619eceb2f6588a87636af72..f6fe76b0c03e94876a6a120b9011c4ada239ae1a 100644
--- a/src/data/newGamePlus.js
+++ b/src/data/newGamePlus.js
@@ -115,9 +115,9 @@ App.Data.NewGamePlus = (function() {
 				let partners = [...slave.partners];
 
 				if (partners.some(i => i > 0)) {
-					partners
+					partners = partners
 						.filter(j => j > 0 && getSlave(j))
-						.forEach(k => k += NGPOffset);
+						.map(k => k += NGPOffset);
 				}
 
 				return new Set(partners);