diff --git a/src/plugins/platforms/wasm/qwasmwindow.cpp b/src/plugins/platforms/wasm/qwasmwindow.cpp
index aac7413994..9b790894df 100644
--- a/src/plugins/platforms/wasm/qwasmwindow.cpp
+++ b/src/plugins/platforms/wasm/qwasmwindow.cpp
@@ -192,6 +192,9 @@ void QWasmWindow::injectMousePressed(const QPoint &local, const QPoint &global,
     else if (normButtonRect().contains(global))
         m_activeControl = QWasmCompositor::SC_TitleBarNormalButton;
 
+    if (button == Qt::LeftButton)
+        QGuiApplicationPrivate::instance()->closeAllPopups();
+
     invalidate();
 }