diff --git a/src/kdbusservice.cpp b/src/kdbusservice.cpp
--- a/src/kdbusservice.cpp
+++ b/src/kdbusservice.cpp
@@ -110,7 +110,7 @@
         objectPath.replace(QLatin1Char('-'), QLatin1Char('_')); // see spec change at https://bugs.freedesktop.org/show_bug.cgi?id=95129
 
         if (options & KDBusService::Multiple) {
-            const bool inSandbox = QFileInfo::exists(QStringLiteral("/flatpak-info"));
+            const bool inSandbox = QFileInfo::exists(QStringLiteral("/.flatpak-info"));
             if (inSandbox) {
                 d->serviceName += QStringLiteral(".kdbus-") + QDBusConnection::sessionBus().baseService().replace(QRegularExpression(QStringLiteral("[\\.:]")), QStringLiteral("_"));
             } else {