diff --git a/parse/products-bitmask.js b/parse/products-bitmask.js
index 4880da7d..04f9b89a 100644
--- a/parse/products-bitmask.js
+++ b/parse/products-bitmask.js
@@ -5,7 +5,7 @@ const createParseBitmask = (bitmasks) => {
 		const products = {}
 		let i = 1
 		do {
-			products[bitmasks[i].product] = !!(bitmask & i)
+			products[bitmasks[i].product] = products[bitmasks[i].product] || !!(bitmask & i)
 			i *= 2
 		} while (bitmasks[i] && bitmasks[i].product)
 		return products