diff --git a/api/cmds/test_page_cmd_impl.cpp b/api/cmds/test_page_cmd_impl.cpp
index e6be40a..dd60f0f 100644
--- a/api/cmds/test_page_cmd_impl.cpp
+++ b/api/cmds/test_page_cmd_impl.cpp
@@ -107,7 +107,7 @@ void TestPageCmdImpl::DBDBTestPage__miniPwmBlowerReadFbcount(json& cmd, json& re
 }
 
 void TestPageCmdImpl::DBDBTestPage__extValveCtrl(json& cmd, json& receipt) {
-  string channel    = jsonGet<string>(cmd["params"]["channel"]);
+  string channel    = cmd["params"]["channel"];
   int    channleVal = -1;
   if (channel == "disinfectionChannel") {
     channleVal = IF_DeviceIoContrlService::kExtValveChannel_disinfectionChannel;