diff --git a/components/ideas/idea-list.tsx b/components/ideas/idea-list.tsx
index e457a02..2edac75 100644
--- a/components/ideas/idea-list.tsx
+++ b/components/ideas/idea-list.tsx
@@ -87,8 +87,14 @@ export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
     return ideas.filter((idea) => {
       if (q && !idea.title.toLowerCase().includes(q)) return false
       if (productFilter !== 'all') {
-        if (productFilter === 'none' && idea.product_id !== null) return false
-        if (productFilter !== 'none' && idea.product_id !== productFilter) return false
+        if (productFilter === 'none') {
+          if (idea.product_id !== null) return false
+        } else {
+          const matchesPrimary = idea.product_id === productFilter
+          const matchesSecondary =
+            idea.secondary_products?.some((sp) => sp.product_id === productFilter) ?? false
+          if (!matchesPrimary && !matchesSecondary) return false
+        }
       }
       if (statusFilter.size > 0 && !statusFilter.has(idea.status)) return false
       return true