diff --git a/src/corelib/tools/qlist.h b/src/corelib/tools/qlist.h
index 35dffaa775c..3bac8611094 100644
--- a/src/corelib/tools/qlist.h
+++ b/src/corelib/tools/qlist.h
@@ -690,7 +690,7 @@ public:
     inline reference back() { return last(); }
     inline const_reference back() const noexcept { return last(); }
     void shrink_to_fit() { squeeze(); }
-    static qsizetype max_size() noexcept
+    static constexpr qsizetype max_size() noexcept
     {
         return Data::max_size();
     }