diff --git a/tests/unit/unittest/CMakeLists.txt b/tests/unit/unittest/CMakeLists.txt
index a6b0d3100de..c5e9c3d0bcf 100644
--- a/tests/unit/unittest/CMakeLists.txt
+++ b/tests/unit/unittest/CMakeLists.txt
@@ -26,6 +26,7 @@ add_qtc_test(unittest GTEST
     Qt5::Xml Qt5::Concurrent Qt5::Qml Qt5::Gui
     Qt6Core5Compat QmlJS
     Googletest
+  CONDITION Qt5_VERSION VERSION_GREATER_EQUAL 6.2.0
   DEFINES
     QT_NO_CAST_TO_ASCII
     QT_RESTRICTED_CAST_FROM_ASCII