diff --git a/src/corelib/io/qstorageinfo_linux_p.h b/src/corelib/io/qstorageinfo_linux_p.h
index b9da13aa0a2..8f92b9e9783 100644
--- a/src/corelib/io/qstorageinfo_linux_p.h
+++ b/src/corelib/io/qstorageinfo_linux_p.h
@@ -35,7 +35,12 @@ enum class FilterMountInfo {
     Filtered,
 };
 
-Q_AUTOTEST_EXPORT std::vector<MountInfo> doParseMountInfo(
+#ifdef QT_BUILD_INTERNAL
+Q_AUTOTEST_EXPORT
+#else
+static
+#endif
+std::vector<MountInfo> doParseMountInfo(
         const QByteArray &mountinfo, FilterMountInfo filter = FilterMountInfo::All);
 
 QT_END_NAMESPACE
diff --git a/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp b/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp
index 08fe3a782d0..10294585856 100644
--- a/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp
+++ b/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp
@@ -22,7 +22,7 @@
 
 #include "../../../../manual/qstorageinfo/printvolumes.cpp"
 
-#ifdef Q_OS_LINUX
+#if defined(Q_OS_LINUX) && defined(QT_BUILD_INTERNAL)
 #  include "../../../../../src/corelib/io/qstorageinfo_linux_p.h"
 #endif