diff --git a/src/plugins/networkinformation/android/CMakeLists.txt b/src/plugins/networkinformation/android/CMakeLists.txt
index f9ed4913e3..07d9201bbb 100644
--- a/src/plugins/networkinformation/android/CMakeLists.txt
+++ b/src/plugins/networkinformation/android/CMakeLists.txt
@@ -29,8 +29,6 @@ qt_internal_add_plugin(QAndroidNetworkInformationPlugin
         wrapper/androidconnectivitymanager.cpp wrapper/androidconnectivitymanager.h
     LIBRARIES
         Qt::NetworkPrivate
-    DEFINES
-        QT_USE_QSTRINGBUILDER
 )
 
 set_property(
diff --git a/src/plugins/platforms/android/CMakeLists.txt b/src/plugins/platforms/android/CMakeLists.txt
index d2edcae67f..0b24e52d9a 100644
--- a/src/plugins/platforms/android/CMakeLists.txt
+++ b/src/plugins/platforms/android/CMakeLists.txt
@@ -54,8 +54,6 @@ qt_internal_add_plugin(QAndroidIntegrationPlugin
         # Conflicting JNI classes, and types
         androidcontentfileengine.cpp
         qandroidplatformintegration.cpp
-    DEFINES
-        QT_USE_QSTRINGBUILDER
     INCLUDE_DIRECTORIES
         ${CMAKE_CURRENT_SOURCE_DIR}
         ${QtBase_SOURCE_DIR}/src/3rdparty/android
diff --git a/src/plugins/tls/schannel/CMakeLists.txt b/src/plugins/tls/schannel/CMakeLists.txt
index 57f4927b4f..a7f7fcd99f 100644
--- a/src/plugins/tls/schannel/CMakeLists.txt
+++ b/src/plugins/tls/schannel/CMakeLists.txt
@@ -31,5 +31,4 @@ qt_internal_add_plugin(QSchannelBackendPlugin
         ncrypt
     DEFINES
         QT_NO_CAST_FROM_ASCII
-        QT_USE_QSTRINGBUILDER
 )