diff --git a/sbin/fsck_msdosfs/check.c b/sbin/fsck_msdosfs/check.c
index 1fb005ddd8d8..083389e09933 100644
--- a/sbin/fsck_msdosfs/check.c
+++ b/sbin/fsck_msdosfs/check.c
@@ -142,7 +142,7 @@ checkfilesys(const char *fname)
 		goto out;
 
 	/* now write the FATs */
-	if (mod & FSFATMOD) {
+	if (mod & (FSFATMOD|FSFIXFAT)) {
 		if (ask(1, "Update FATs")) {
 			mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
 			if (mod & FSFATAL)
diff --git a/sbin/fsck_msdosfs/ext.h b/sbin/fsck_msdosfs/ext.h
index 9793e12bacd7..ef9c420c90d0 100644
--- a/sbin/fsck_msdosfs/ext.h
+++ b/sbin/fsck_msdosfs/ext.h
@@ -26,7 +26,7 @@
  */
 
 #ifndef EXT_H
-#define EXT_H
+#define	EXT_H
 
 #include <sys/types.h>
 
@@ -69,8 +69,8 @@ int checkfilesys(const char *);
 #define	FSFATMOD	4		/* The FAT was modified */
 #define	FSERROR		8		/* Some unrecovered error remains */
 #define	FSFATAL		16		/* Some unrecoverable error occurred */
-#define FSDIRTY		32		/* File system is dirty */
-#define FSFIXFAT	64		/* Fix file system FAT */
+#define	FSDIRTY		32		/* File system is dirty */
+#define	FSFIXFAT	64		/* Fix file system FAT */
 
 /*
  * read a boot block in a machine independent fashion and translate