diff --git a/src/plugins/cppeditor/cppincludehierarchy_test.cpp b/src/plugins/cppeditor/cppincludehierarchy_test.cpp
index d37448dd1620318bbcac412ec161ecd234765dc6..e9235b5cdf14059d19932044933ee05d244a2cdb 100644
--- a/src/plugins/cppeditor/cppincludehierarchy_test.cpp
+++ b/src/plugins/cppeditor/cppincludehierarchy_test.cpp
@@ -40,6 +40,8 @@
 #include <QList>
 #include <QtTest>
 
+Q_DECLARE_METATYPE(QList<QByteArray>)
+
 using namespace CPlusPlus;
 using namespace CppEditor::Internal;
 using namespace CppTools;