diff --git a/man7/man-pages.7 b/man7/man-pages.7
index 3ffe30e4d..da10ece98 100644
--- a/man7/man-pages.7
+++ b/man7/man-pages.7
@@ -264,6 +264,7 @@ values that may be placed in
 .I errno
 in the event of an error, along with information about the cause
 of the errors.
+.IR "The error list should be in alphabetical order" .
 .TP
 .B ENVIRONMENT
 lists all environment variables that affect the program or function