diff --git a/src/plugins/cpptools/cppmodelmanager_test.cpp b/src/plugins/cpptools/cppmodelmanager_test.cpp
index 34c05f0ac7c5aeec5b86f9d1b4cbf36e66d9d5a1..6fa0d48169cac270dd8cd660b606ab66a279aad7 100644
--- a/src/plugins/cpptools/cppmodelmanager_test.cpp
+++ b/src/plugins/cpptools/cppmodelmanager_test.cpp
@@ -48,7 +48,7 @@ typedef CppTools::ProjectPart ProjectPart;
 typedef CppTools::ProjectFile ProjectFile;
 typedef ProjectExplorer::Project Project;
 
-Q_DECLARE_METATYPE(ProjectFile)
+Q_DECLARE_METATYPE(QList<ProjectFile>)
 
 namespace {