diff --git a/src/routes/api/recipes/[id]/+server.ts b/src/routes/api/recipes/[id]/+server.ts
index 95773e2..efc43be 100644
--- a/src/routes/api/recipes/[id]/+server.ts
+++ b/src/routes/api/recipes/[id]/+server.ts
@@ -35,7 +35,7 @@ const PatchSchema = z
   .object({
     title: z.string().min(1).max(200).optional(),
     description: z.string().max(2000).nullable().optional(),
-    servings_default: z.number().int().positive().nullable().optional(),
+    servings_default: z.number().int().nonnegative().nullable().optional(),
     servings_unit: z.string().max(30).nullable().optional(),
     prep_time_min: z.number().int().nonnegative().nullable().optional(),
     cook_time_min: z.number().int().nonnegative().nullable().optional(),