Like the other times it's used in this file
This is causing compilation errors in projects that use -Werror=undef
Fixes: QTBUG-123937
Change-Id: I0cdd2910755dc9079890011dd8dbc27a6e64793e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 699ddcb15b5e981d32ea65d1c1a12f8fa0b06e0d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>