diff --git a/bin/echo/echo.1 b/bin/echo/echo.1
index 694c57308b1f..e498af704c21 100644
--- a/bin/echo/echo.1
+++ b/bin/echo/echo.1
@@ -58,11 +58,20 @@ output.
 The following option is available:
 .Bl -tag -width flag
 .It Fl n
-Do not print the trailing newline character.  This may also be
-achieved by appending
+Do not print the trailing newline character.
+This may also be achieved by appending
 .Ql \ec
 to the end of the string, as is done
 by iBCS2 compatible systems.
+Note that this option as well as the effect of
+.Ql \ec
+are implementation-defined in
+.St -p1003.1-2001
+as amended by Cor. 1-2002.
+Applications aiming for maximum
+portability are strongly encouraged to use
+.Xr printf 1
+to suppress the newline character.
 .El
 .Pp
 Some shells may provide a builtin