diff --git a/examples/network/network-chat/CMakeLists.txt b/examples/network/network-chat/CMakeLists.txt
index 6b6abd1c462..dd3164a1e7c 100644
--- a/examples/network/network-chat/CMakeLists.txt
+++ b/examples/network/network-chat/CMakeLists.txt
@@ -28,6 +28,10 @@ set_target_properties(network-chat PROPERTIES
     MACOSX_BUNDLE TRUE
 )
 
+target_compile_definitions(network-chat PRIVATE
+    QT_USE_QSTRINGBUILDER
+)
+
 target_link_libraries(network-chat PRIVATE
     Qt6::Core
     Qt6::Gui
diff --git a/examples/network/network-chat/network-chat.pro b/examples/network/network-chat/network-chat.pro
index 2e3cbbc4895..626a7109497 100644
--- a/examples/network/network-chat/network-chat.pro
+++ b/examples/network/network-chat/network-chat.pro
@@ -11,6 +11,7 @@ SOURCES       = chatdialog.cpp \
                 server.cpp
 FORMS         = chatdialog.ui
 QT           += network widgets
+DEFINES      += QT_USE_QSTRINGBUILDER
 requires(qtConfig(udpsocket))
 requires(qtConfig(listwidget))