diff --git a/src/api_s2c/event/payForDiamond/ApiReceive.ts b/src/api_s2c/event/payForDiamond/ApiReceive.ts
index 768fed2..3ceedf5 100644
--- a/src/api_s2c/event/payForDiamond/ApiReceive.ts
+++ b/src/api_s2c/event/payForDiamond/ApiReceive.ts
@@ -73,7 +73,7 @@ export default async function (call: ApiCall<ReqReceive, ResReceive>) {
         // 减去余额
         const filter = {
             hdid: call.req.activityId,
-            $expr: {$gte: [ `$data.totalmoney - ${gotAmount}`, 0 ]},
+            $expr: { $gte: ['$data.totalmoney', gotAmount ]},
         };
         const updateDoc = { 
             $inc: { 'data.totalmoney': -1 * Math.abs(gotAmount) }