diff --git a/src/corelib/kernel/qeventdispatcher_wasm.cpp b/src/corelib/kernel/qeventdispatcher_wasm.cpp
index cc79324096..8b64856621 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm.cpp
+++ b/src/corelib/kernel/qeventdispatcher_wasm.cpp
@@ -116,6 +116,8 @@ Q_CONSTINIT QEventDispatcherWasm *QEventDispatcherWasm::g_mainThreadEventDispatc
 #if QT_CONFIG(thread)
 Q_CONSTINIT QVector<QEventDispatcherWasm *> QEventDispatcherWasm::g_secondaryThreadEventDispatchers;
 Q_CONSTINIT std::mutex QEventDispatcherWasm::g_staticDataMutex;
+emscripten::ProxyingQueue QEventDispatcherWasm::g_proxyingQueue;
+pthread_t QEventDispatcherWasm::g_mainThread;
 #endif
 // ### dynamic initialization:
 std::multimap<int, QSocketNotifier *> QEventDispatcherWasm::g_socketNotifiers;
@@ -144,6 +146,9 @@ QEventDispatcherWasm::QEventDispatcherWasm()
         // dispatchers so we set a global pointer to it.
         Q_ASSERT(g_mainThreadEventDispatcher == nullptr);
         g_mainThreadEventDispatcher = this;
+#if QT_CONFIG(thread)
+        g_mainThread = pthread_self();
+#endif
     } else {
 #if QT_CONFIG(thread)
         std::lock_guard<std::mutex> lock(g_staticDataMutex);
@@ -818,7 +823,9 @@ void QEventDispatcherWasm::runOnMainThread(std::function<void(void)> fn)
 #if QT_CONFIG(thread)
     if (!emscripten_is_main_runtime_thread()) {
         void *context = new std::function<void(void)>(fn);
-        emscripten_async_run_in_main_runtime_thread_(EM_FUNC_SIG_VI, reinterpret_cast<void *>(trampoline), context);
+        g_proxyingQueue.proxyAsync(g_mainThread, [context]{
+            trampoline(context);
+        });
         return;
     }
 #endif
@@ -832,7 +839,9 @@ void QEventDispatcherWasm::runOnMainThreadAsync(std::function<void(void)> fn)
     void *context = new std::function<void(void)>(fn);
 #if QT_CONFIG(thread)
     if (!emscripten_is_main_runtime_thread()) {
-        emscripten_async_run_in_main_runtime_thread_(EM_FUNC_SIG_VI, reinterpret_cast<void *>(trampoline), context);
+        g_proxyingQueue.proxyAsync(g_mainThread, [context]{
+            trampoline(context);
+        });
         return;
     }
 #endif
diff --git a/src/corelib/kernel/qeventdispatcher_wasm_p.h b/src/corelib/kernel/qeventdispatcher_wasm_p.h
index 50f1bda2b2..f253a1a95f 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm_p.h
+++ b/src/corelib/kernel/qeventdispatcher_wasm_p.h
@@ -24,6 +24,8 @@
 #include <optional>
 #include <tuple>
 
+#include <emscripten/proxying.h>
+
 QT_BEGIN_NAMESPACE
 
 Q_DECLARE_LOGGING_CATEGORY(lcEventDispatcher);
@@ -106,6 +108,8 @@ private:
 
     static QVector<QEventDispatcherWasm *> g_secondaryThreadEventDispatchers;
     static std::mutex g_staticDataMutex;
+    static emscripten::ProxyingQueue g_proxyingQueue;
+    static pthread_t g_mainThread;
 
     // Note on mutex usage: the global g_staticDataMutex protects the global (g_ prefixed) data,
     // while the per eventdispatcher m_mutex protects the state accociated with blocking and waking