diff --git a/include/linux/fs.h b/include/linux/fs.h
index aa4530c1ff7a..e68780810279 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -44,7 +44,7 @@ extern int get_max_files(void);
 struct inodes_stat_t {
 	int nr_inodes;
 	int nr_unused;
-	int dummy[5];
+	int dummy[5];		/* padding for sysctl ABI compatibility */
 };
 extern struct inodes_stat_t inodes_stat;