diff --git a/KF5PackageMacros.cmake b/KF5PackageMacros.cmake
--- a/KF5PackageMacros.cmake
+++ b/KF5PackageMacros.cmake
@@ -23,7 +23,10 @@
 
 set(kpackagedir ${CMAKE_CURRENT_LIST_DIR})
 function(kpackage_install_package dir component)
-   message(AUTHOR_WARNING "Deprecated: use kpackage_install_bundled_package")
+   # allow plasma_install_package to disable the warning until it is ported away from this
+   if (NOT ARGV4 STREQUAL NO_DEPRECATED_WARNING)
+      message(AUTHOR_WARNING "Deprecated: use kpackage_install_bundled_package")
+   endif()
    set(root ${ARGV2})
    set(install_dir ${ARGV3})
    if(NOT root)