diff --git a/sbin/fsck_msdosfs/ext.h b/sbin/fsck_msdosfs/ext.h
index 0e93c2440200..53127cf44ab4 100644
--- a/sbin/fsck_msdosfs/ext.h
+++ b/sbin/fsck_msdosfs/ext.h
@@ -55,7 +55,7 @@ extern struct dosDirEntry *rootDir;
 /*
  * function declarations
  */
-int ask(int, const char *, ...) __attribute__((__format__(__printf__,2,3)));
+int ask(int, const char *, ...) __printflike(2, 3);
 
 /*
  * Check the dirty flag.  If the file system is clean, then return 1.