diff --git a/cmake/QtBaseGlobalTargets.cmake b/cmake/QtBaseGlobalTargets.cmake
index 67d20b775cc..b854d308459 100644
--- a/cmake/QtBaseGlobalTargets.cmake
+++ b/cmake/QtBaseGlobalTargets.cmake
@@ -77,7 +77,7 @@ target_include_directories(GlobalConfigPrivate INTERFACE
 add_library(Qt::GlobalConfigPrivate ALIAS GlobalConfigPrivate)
 
 install(TARGETS Platform GlobalConfig GlobalConfigPrivate EXPORT "${INSTALL_CMAKE_NAMESPACE}Targets")
-install(EXPORT "${INSTALL_CMAKE_NAMESPACE}Targets" NAMESPACE ${INSTALL_CMAKE_EXPORT_NAMESPACE}:: DESTINATION "${config_install_dir}")
+install(EXPORT "${INSTALL_CMAKE_NAMESPACE}Targets" NAMESPACE ${QT_CMAKE_EXPORT_NAMESPACE}:: DESTINATION "${config_install_dir}")
 export(EXPORT "${INSTALL_CMAKE_NAMESPACE}Targets")
 
 ## Install some QtBase specific CMake files: