diff --git a/man7/unicode.7 b/man7/unicode.7
index 045a0fb56..8bd085573 100644
--- a/man7/unicode.7
+++ b/man7/unicode.7
@@ -115,7 +115,7 @@ classic
 character set and the characters in the range 0x0000 to 0x00ff
 are identical to those in
 .BR "ISO 8859-1 Latin-1" .
-.SH "COMBINING CHARACTERS"
+.SS "Combining Characters"
 Some code points in
 .B UCS
 have been assigned to
@@ -136,7 +136,7 @@ followed by a "combining diaeresis": 0x0041 0x0308.
 Combining characters are essential for instance for encoding the Thai
 script or for mathematical typesetting and users of the International
 Phonetic Alphabet.
-.SH "IMPLEMENTATION LEVELS"
+.SS "Implementation Levels"
 As not all systems are expected to support advanced mechanisms like
 combining characters, ISO 10646-1 specifies the following three
 .I implementation levels
@@ -175,7 +175,7 @@ various characters.
 They provide guidelines and algorithms for
 editing, sorting, comparing, normalizing, converting and displaying
 Unicode strings.
-.SH "UNICODE UNDER LINUX"
+.SS "Unicode Under Linux"
 Under GNU/Linux, the C type
 .B wchar_t
 is a signed 32-bit integer type.
@@ -221,7 +221,7 @@ by some UTF-8 terminal emulators and ISO 10646 fonts (level 2), but in
 general precomposed characters should be preferred where available
 (Unicode calls this
 .BR "Normalization Form C" ).
-.SH "PRIVATE AREA"
+.SS "Private Area"
 In the
 .BR BMP ,
 the range 0xe000 to 0xf8ff will never be assigned to any characters by
@@ -234,7 +234,7 @@ coordinated among all Linux users.
 The registry of the characters
 assigned to the Linux zone is currently maintained by H. Peter Anvin
 <Peter.Anvin@linux.org>.
-.SH LITERATURE
+.SS Literature
 .TP 0.2i
 *
 Information technology \(em Universal Multiple-Octet Coded Character