diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 12c253664eb223e524d31b2fb6bc800f9286cd44..1bd69aa9e22acd2905a28e0e5c76d27d0bd00c94 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -21,6 +21,9 @@ config MTD_PHYSMAP
 	  particular board as well as the bus width, either statically
 	  with config options or at run-time.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called physmap.
+
 config MTD_PHYSMAP_START
 	hex "Physical start address of flash mapping"
 	depends on MTD_PHYSMAP