diff --git a/src/corelib/text/qlocale_unix.cpp b/src/corelib/text/qlocale_unix.cpp
index 6f6884d366..db4108fb71 100644
--- a/src/corelib/text/qlocale_unix.cpp
+++ b/src/corelib/text/qlocale_unix.cpp
@@ -265,6 +265,7 @@ QVariant QSystemLocale::query(QueryType type, QVariant in) const
         return lc_messages.createSeparatedList(in.toStringList());
     case LocaleChanged:
         Q_ASSERT(false);
+        [[fallthrough]];
     default:
         break;
     }