diff --git a/src/corelib/global/qlogging.cpp b/src/corelib/global/qlogging.cpp
index 4a80b1c5c6d..94ec78f3820 100644
--- a/src/corelib/global/qlogging.cpp
+++ b/src/corelib/global/qlogging.cpp
@@ -1789,13 +1789,6 @@ static void stderr_message_handler(QtMsgType type, const QMessageLogContext &con
     if (formattedMessage.isNull())
         return;
 
-#ifdef Q_OS_WASM
-    // Prevent thread cross-talk, which causes Emscripten to log
-    // non-valid UTF-8. FIXME: remove once we upgrade to emsdk > 2.0.30
-    Q_CONSTINIT static QBasicMutex m;
-    auto locker = qt_unique_lock(m);
-#endif
-
     fprintf(stderr, "%s\n", formattedMessage.toLocal8Bit().constData());
     fflush(stderr);
 }