diff --git a/config/Config-images.in b/config/Config-images.in
index aa23876259..0252ef6425 100644
--- a/config/Config-images.in
+++ b/config/Config-images.in
@@ -150,7 +150,7 @@ menu "Target Images"
 		bool "squashfs"
 		default y if USES_SQUASHFS
 		help
-		  Build a squashfs-lzma root filesystem.
+		  Build a squashfs root filesystem.
 
 		config TARGET_SQUASHFS_BLOCK_SIZE
 			int "Block size (in KiB)"
@@ -158,6 +158,9 @@ menu "Target Images"
 			default 64 if LOW_MEMORY_FOOTPRINT
 			default 1024 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
 			default 256
+			help
+			  Select squashfs block size, must be one of:
+			    4, 8, 16, 32, 64, 128, 256, 512, 1024
 
 	menuconfig TARGET_ROOTFS_UBIFS
 		bool "ubifs"