diff --git a/backend/src/services/approval-policy/approval-policy-schemas.ts b/backend/src/services/approval-policy/approval-policy-schemas.ts
index 3c47b2c6b..d912e3245 100644
--- a/backend/src/services/approval-policy/approval-policy-schemas.ts
+++ b/backend/src/services/approval-policy/approval-policy-schemas.ts
@@ -47,7 +47,7 @@ export const BaseCreateApprovalPolicySchema = z.object({
 
 export const BaseUpdateApprovalPolicySchema = z.object({
   name: z.string().min(1).max(128).optional(),
-  maxRequestTtlSeconds: MaxRequestTtlSchema.nullable().optional(),
+  maxRequestTtl: MaxRequestTtlSchema.nullable().optional(),
   steps: ApprovalPolicyStepSchema.array().optional()
 });