--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -557,7 +557,7 @@ config MEM_SOFT_DIRTY
 	  See Documentation/vm/soft-dirty.txt for more details.
 
 config ZSMALLOC
-	bool "Memory allocator for compressed pages"
+	tristate "Memory allocator for compressed pages"
 	depends on MMU
 	default n
 	help
