diff --git a/man7/attr.7 b/man7/attr.7
index f7f9aa734..589a6918d 100644
--- a/man7/attr.7
+++ b/man7/attr.7
@@ -53,7 +53,7 @@ of the file owner and file group.
 .PP
 Currently, support for extended attributes is implemented on Linux by the
 ext2, ext3, ext4, XFS, JFS and reiserfs filesystems.
-.SH EXTENDED ATTRIBUTE NAMESPACES
+.SS Extended attribute namespaces
 Attribute names are zero-terminated strings.
 The attribute name is always specified in the fully qualified
 .IR namespace.attribute
@@ -124,7 +124,7 @@ owner and to users with appropriate capabilities for directories with the
 sticky bit set (see the
 .BR chmod (1)
 manual page for an explanation of Sticky Directories).
-.SH FILESYSTEM DIFFERENCES
+.SS Filesystem differences
 The kernel and the filesystem may place limits on the maximum number
 and size of extended attributes that can be associated with a file.
 Some file systems, such as ext2/3 and reiserfs, require the filesystem
@@ -144,7 +144,7 @@ attribute information on disk are scalable.
 .PP
 In the JFS filesystem implementation, names can be up to 255 bytes and
 values up to 65,535 bytes.
-.SH ADDITIONAL NOTES
+.SS NOTES
 Since the filesystems on which extended attributes are stored might also
 be used on architectures with a different byte order and machine word
 size, care should be taken to store attribute values in an architecture