diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1dc02101e5e51..4b547024571f9 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -213,7 +213,8 @@ void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
 
 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 {
-	block_t limit = (sbi->user_block_count << 1) / 1000;
+	block_t limit = min((sbi->user_block_count << 1) / 1000,
+			sbi->user_block_count - sbi->reserved_blocks);
 
 	/* limit is 0.2% */
 	if (test_opt(sbi, RESERVE_ROOT) &&