diff --git a/src/plugins/qmldesigner/CMakeLists.txt b/src/plugins/qmldesigner/CMakeLists.txt
index f7024e4dd55..cda9c8a96c6 100644
--- a/src/plugins/qmldesigner/CMakeLists.txt
+++ b/src/plugins/qmldesigner/CMakeLists.txt
@@ -11,6 +11,7 @@ option(USE_PROJECTSTORAGE "Use ProjectStorage" ${ENV_QDS_USE_PROJECTSTORAGE})
 add_feature_info("ProjectStorage" ${USE_PROJECTSTORAGE} "")
 
 add_qtc_library(QmlDesignerUtils STATIC
+  PROPERTIES COMPILE_WARNING_AS_ERROR ON
   DEPENDS
     Qt::Gui Utils Qt::QmlPrivate
   DEFINES QMLDESIGNERUTILS_LIBRARY
@@ -405,6 +406,7 @@ set_property(SOURCE ${PROJECTSTORAGE_EXCLUDED_SOURCES} PROPERTY SKIP_AUTOMOC ON)
 
 add_qtc_plugin(QmlDesigner
   CONDITION Qt6_VERSION VERSION_GREATER_EQUAL 6.2.0 AND TARGET Qt::QuickWidgets AND TARGET Qt::Svg
+  PROPERTIES COMPILE_WARNING_AS_ERROR ON
   DEPENDS
     QmlJS LanguageUtils QmlEditorWidgets AdvancedDockingSystem
     Qt::QuickWidgets Qt::CorePrivate Sqlite Qt::Xml Qt::Svg
diff --git a/src/plugins/qmldesignerbase/CMakeLists.txt b/src/plugins/qmldesignerbase/CMakeLists.txt
index fa7f63d5a94..f03498f28d9 100644
--- a/src/plugins/qmldesignerbase/CMakeLists.txt
+++ b/src/plugins/qmldesignerbase/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_qtc_plugin(QmlDesignerBase
+  PROPERTIES COMPILE_WARNING_AS_ERROR ON
   DEPENDS Qt::Core Qt::QuickWidgets
   PLUGIN_DEPENDS Core ProjectExplorer QtSupport
   SOURCES
diff --git a/src/plugins/qmlprojectmanager/CMakeLists.txt b/src/plugins/qmlprojectmanager/CMakeLists.txt
index 5ecc763ef73..dfa38125ee1 100644
--- a/src/plugins/qmlprojectmanager/CMakeLists.txt
+++ b/src/plugins/qmlprojectmanager/CMakeLists.txt
@@ -1,5 +1,6 @@
 add_qtc_plugin(QmlProjectManager
   CONDITION TARGET Qt5::QuickWidgets
+  PROPERTIES COMPILE_WARNING_AS_ERROR ON
   PLUGIN_CLASS QmlProjectPlugin
   DEPENDS QmlJS Qt5::QuickWidgets
   PLUGIN_DEPENDS Core ProjectExplorer QtSupport QmlDesignerBase