diff --git a/src/plugins/qmldesigner/CMakeLists.txt b/src/plugins/qmldesigner/CMakeLists.txt
index d46dd38fe0f..fe3a5d00f97 100644
--- a/src/plugins/qmldesigner/CMakeLists.txt
+++ b/src/plugins/qmldesigner/CMakeLists.txt
@@ -458,6 +458,7 @@ extend_qtc_library(QmlDesignerCore
   SOURCES_PREFIX designercore/projectstorage
   PUBLIC_INCLUDES designercore/projectstorage
   SOURCES_PROPERTIES SKIP_AUTOGEN ON
+  DEFINES QML_DOM_MSVC2019_COMPAT # can be removed for Qt 6.8
   SOURCES
     commontypecache.h
     directorypathcompressor.h
diff --git a/tests/unit/tests/unittests/projectstorage/CMakeLists.txt b/tests/unit/tests/unittests/projectstorage/CMakeLists.txt
index ef5d7290ada..2f7aaccf7a3 100644
--- a/tests/unit/tests/unittests/projectstorage/CMakeLists.txt
+++ b/tests/unit/tests/unittests/projectstorage/CMakeLists.txt
@@ -26,7 +26,7 @@ extend_qtc_test(unittest
   CONDITION TARGET Qt6::QmlDomPrivate AND TARGET Qt6::QmlCompilerPrivate AND IS_SUPPORTED_PROJECTSTORAGE_QT
   SOURCES_PREFIX "${QmlDesignerDir}/designercore"
   DEPENDS Qt6::QmlDomPrivate Qt6::QmlCompilerPrivate
-  DEFINES QDS_BUILD_QMLPARSER
+  DEFINES QDS_BUILD_QMLPARSER QML_DOM_MSVC2019_COMPAT # QML_DOM_MSVC2019_COMPAT can be revmoved for Qt 6.8
   SOURCES
     projectstorage/qmldocumentparser.cpp projectstorage/qmldocumentparser.h
     projectstorage/qmltypesparser.cpp projectstorage/qmltypesparser.h