1 files changed, 6 insertions, 5 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 665ce173e664..0810d27c039e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -652,11 +652,12 @@ config ZBOOT_ROM_BSS
         hex "Compressed ROM boot loader BSS address"
         default "0"
         help
-          The base address of 64KiB of read/write memory in the target
-          for the ROM-able zImage, which must be available while the
-          decompressor is running.  Platforms which normally make use of
-          ROM-able zImage formats normally set this to a suitable
-          value in their defconfig file.
+          The base address of an area of read/write memory in the target
+          for the ROM-able zImage which must be available while the
+          decompressor is running. It must be large enough to hold the
+          entire decompressed kernel plus an additional 128 KiB.
+          Platforms which normally make use of ROM-able zImage formats
+          normally set this to a suitable value in their defconfig file.
 
           If ZBOOT_ROM is not enabled, this has no effect.