diff --git a/backend/src/recipes/recipe-analysis.service.ts b/backend/src/recipes/recipe-analysis.service.ts
index a4922719..6b5f0afd 100644
--- a/backend/src/recipes/recipe-analysis.service.ts
+++ b/backend/src/recipes/recipe-analysis.service.ts
@@ -82,7 +82,7 @@ export class RecipeAnalysisService {
     const pantryProductIds = new Set(pantryItems.map((p) => p.productId));
 
     const userInventory = await this.prisma.inventoryItem.findMany({
-      where: { userId },
+      where: { product: { ownerId: userId } },
       select: { productId: true },
     });
     const availableProductIds = new Set<number>([
@@ -154,7 +154,7 @@ export class RecipeAnalysisService {
         }
 
         const inventoryItems = await this.prisma.inventoryItem.findMany({
-          where: { productId: ingredient.productId, userId },
+          where: { productId: ingredient.productId, product: { ownerId: userId } },
           select: { quantity: true, unit: true },
         });