diff --git a/block/Kconfig b/block/Kconfig
index 83766a6..a50f481 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -19,11 +19,9 @@
 
 if BLOCK
 
-#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
-#for instance.
 config LBD
 	bool "Support for Large Block Devices"
-	depends on X86 || (MIPS && 32BIT) || PPC32 || (S390 && !64BIT) || SUPERH || UML
+	depends on !64BIT
 	help
 	  Say Y here if you want to attach large (bigger than 2TB) discs to
 	  your machine, or if you want to have a raid or loopback device
@@ -44,7 +42,7 @@
 
 config LSF
 	bool "Support for Large Single Files"
-	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
+	depends on !64BIT
 	help
 	  Say Y here if you want to be able to handle very large files (bigger
 	  than 2TB), otherwise say N.