diff --git a/README b/README
index a3b62e1..a1910dc 100644
--- a/README
+++ b/README
@@ -1175,6 +1175,11 @@
 		to disable the command chpart. This is the default when you
 		have not defined a custom partition
 
+- FAT(File Allocation Table) filesystem write function support:
+		CONFIG_FAT_WRITE
+		Support for saving memory data as a file
+		in FAT formatted partition
+
 - Keyboard Support:
 		CONFIG_ISA_KEYBOARD