diff --git a/src/libs/utils/mimetypes2/mimedatabase.cpp b/src/libs/utils/mimetypes2/mimedatabase.cpp
index e1b5fd90329..ba2d3d92b91 100644
--- a/src/libs/utils/mimetypes2/mimedatabase.cpp
+++ b/src/libs/utils/mimetypes2/mimedatabase.cpp
@@ -56,6 +56,7 @@ MimeDatabasePrivate::~MimeDatabasePrivate()
 }
 
 #if 0
+Q_CONSTINIT
 #if 0 //def QT_BUILD_INTERNAL
 Q_CORE_EXPORT
 #else