diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 19eafbe..2b2eec1 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -175,7 +175,7 @@
 
 	if (rw == WRITE) {
 		/*
-		 * FIXME: blockdev_direct_IO() doesn't use ->prepare_write(),
+		 * FIXME: blockdev_direct_IO() doesn't use ->write_begin(),
 		 * so we need to update the ->mmu_private to block boundary.
 		 *
 		 * But we must fill the remaining area or hole by nul for