diff --git a/man7/unicode.7 b/man7/unicode.7
index b21b5fb61..dc586d81c 100644
--- a/man7/unicode.7
+++ b/man7/unicode.7
@@ -191,7 +191,7 @@ and
 tells, how many positions (0\(en2) the cursor is advanced by the
 output of a character.
 .PP
-.SS Private area
+.SS Private Use Areas (PUA)
 In the Basic Multilingual Plane,
 the range 0xe000 to 0xf8ff will never be assigned to any characters by
 the standard and is reserved for private usage.
@@ -205,6 +205,11 @@ assigned to the Linux zone is maintained by LANANA and the registry
 itself is
 .I Documentation/unicode.txt
 in the Linux kernel sources.
+.PP
+Two other planes are reserved for private usage, plane 15
+(Supplementary Private Use Area-A, range 0xf0000 to 0xffffd)
+and plane 16 (Supplementary Private Use Area-B, range
+0x100000 to 0x10fffd).
 .SS Literature
 .IP * 3
 Information technology \(em Universal Multiple-Octet Coded Character