diff --git a/packages/plugins/libs/qiankun/slave/slaveRuntimePlugin.ts b/packages/plugins/libs/qiankun/slave/slaveRuntimePlugin.ts
index e16244405db5..0d3c403d08f4 100644
--- a/packages/plugins/libs/qiankun/slave/slaveRuntimePlugin.ts
+++ b/packages/plugins/libs/qiankun/slave/slaveRuntimePlugin.ts
@@ -11,9 +11,7 @@ export function modifyClientRenderOpts(memo: any) {
   const clientRenderOpts = contextOptsStack.shift();
   const { basename, historyType } = memo;
 
-  // use ?? instead of ||, incase clientRenderOpts.basename is ''
-  // only break when microApp has a config.base and mount path is /*
-  const newBasename = clientRenderOpts?.basename ?? basename;
+  const newBasename = clientRenderOpts?.basename || basename;
   const newHistoryType = clientRenderOpts?.historyType || historyType;
 
   if (newHistoryType !== historyType || newBasename !== basename) {