diff --git a/packages/zod/src/converter.test.ts b/packages/zod/src/converter.test.ts
index 723e79e20..4b07c451b 100644
--- a/packages/zod/src/converter.test.ts
+++ b/packages/zod/src/converter.test.ts
@@ -286,7 +286,7 @@ const processedCases: SchemaTestCase[] = [
   },
   {
     schema: z.string().nullable(),
-    input: [true, { anyOf: [{ type: 'null' }, { type: 'string' }] }],
+    input: [true, { anyOf: [{ type: 'string' }, { type: 'null' }] }],
     ignoreZodToJsonSchema: true,
   },
   {
diff --git a/packages/zod/src/converter.ts b/packages/zod/src/converter.ts
index cae2dad73..dd40599b5 100644
--- a/packages/zod/src/converter.ts
+++ b/packages/zod/src/converter.ts
@@ -610,7 +610,7 @@ export class ZodToJsonSchemaConverter implements ConditionalSchemaConverter {
 
         const [required, json] = this.convert(schema_._def.innerType, options, lazyDepth, false, false, structureDepth)
 
-        return [required, { anyOf: [{ type: 'null' }, json] }]
+        return [required, { anyOf: [json, { type: 'null' }] }]
       }
     }