diff --git a/fs/cramfs/Kconfig b/fs/cramfs/Kconfig
index f937082f32449a9f3316e581675c47e51f7f6d30..58e2fe40b2a04423de26729613bae16c233c8920 100644
--- a/fs/cramfs/Kconfig
+++ b/fs/cramfs/Kconfig
@@ -34,6 +34,7 @@ config CRAMFS_BLOCKDEV
 config CRAMFS_MTD
 	bool "Support CramFs image directly mapped in physical memory"
 	depends on CRAMFS && MTD
+	depends on CRAMFS=m || MTD=y
 	default y if !CRAMFS_BLOCKDEV
 	help
 	  This option allows the CramFs driver to load data directly from