diff --git a/tests/auto/qfiledialog/tst_qfiledialog.cpp b/tests/auto/qfiledialog/tst_qfiledialog.cpp
index 08d2e88f3c..81da8a3f62 100644
--- a/tests/auto/qfiledialog/tst_qfiledialog.cpp
+++ b/tests/auto/qfiledialog/tst_qfiledialog.cpp
@@ -80,7 +80,9 @@
 # define SRCDIR "C:/Private/" TOSTRING(SYMBIAN_SRCDIR_UID) "/"
 #elif defined(Q_OS_UNIX)
 #ifdef QT_BUILD_INTERNAL
+QT_BEGIN_NAMESPACE
 extern Q_GUI_EXPORT QString qt_tildeExpansion(const QString &path, bool *expanded = 0);
+QT_END_NAMESPACE
 #endif
 #endif