diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 46d3d89f3ac5..7d3ba65ab638 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2446,7 +2446,6 @@ static inline int get_extra_isize(struct inode *inode)
 	return F2FS_I(inode)->i_extra_isize / sizeof(__le32);
 }
 
-static inline int f2fs_sb_has_flexible_inline_xattr(struct super_block *sb);
 static inline int get_inline_xattr_addrs(struct inode *inode)
 {
 	return F2FS_I(inode)->i_inline_xattr_size;