diff --git a/fs/fs.c b/fs/fs.c
index 7fd2210..1a6a64e 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -168,7 +168,7 @@
 		.exists = fat_exists,
 		.size = fat_size,
 		.read = fat_read_file,
-#ifdef CONFIG_FAT_WRITE
+#if CONFIG_IS_ENABLED(FAT_WRITE)
 		.write = file_fat_write,
 		.unlink = fat_unlink,
 		.mkdir = fat_mkdir,