diff --git a/src/corelib/kernel/qpermissions_wasm.cpp b/src/corelib/kernel/qpermissions_wasm.cpp
index 7e885a4382f..846e62ccf76 100644
--- a/src/corelib/kernel/qpermissions_wasm.cpp
+++ b/src/corelib/kernel/qpermissions_wasm.cpp
@@ -131,7 +131,7 @@ namespace
             return cb(Qt::PermissionStatus::Denied);
 
         qstdweb::PromiseCallbacks queryCallbacks;
-        queryCallbacks.thenFunc = [device, cb](val mediaStream)
+        queryCallbacks.thenFunc = [device, cb](val)
         {
             updatePermission(device, wapiGranted, cb);
         };