diff --git a/firmware/export/disk.h b/firmware/export/disk.h
index 865b7bb4b4..7a9697aa13 100644
--- a/firmware/export/disk.h
+++ b/firmware/export/disk.h
@@ -27,6 +27,7 @@ struct partinfo {
 
 #define PARTITION_TYPE_FAT32     0x0b
 #define PARTITION_TYPE_FAT32_LBA 0x0c
+#define PARTITION_TYPE_FAT16     0x06
 
 /* returns a pointer to an array of 8 partinfo structs */
 struct partinfo* disk_init(void);