diff --git a/usr.bin/more/ch.c b/usr.bin/more/ch.c
index 6dccea7d5510..711bac80dcca 100644
--- a/usr.bin/more/ch.c
+++ b/usr.bin/more/ch.c
@@ -36,6 +36,11 @@
 static char sccsid[] = "@(#)ch.c	8.1 (Berkeley) 6/6/93";
 #endif /* not lint */
 
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
 /*
  * Low level character input from the input file.
  * We use these special purpose routines which optimize moving
@@ -172,22 +177,17 @@ read_more:
 	if (ispipe)
 		last_piped_pos += n;
 
-	p = &bp->data[bp->datasize];
 	bp->datasize += n;
 
-	/*
-	 * Set an EOI marker in the buffered data itself.  Then ensure the
-	 * data is "clean": there are no extra EOI chars in the data and
-	 * that the "meta" bit (the 0200 bit) is reset in each char;
-	 * also translate \r\n sequences to \n if -u flag not set.
-	 */
 	if (n == 0) {
 		ch_fsize = pos;
 		bp->data[bp->datasize++] = EOI;
 	}
 
+	/*
+	 * Turn EOI (nul) characters into 0200 since EOI has special meaning.		 */
 	for (p = &bp->data[bp->datasize]; --n >= 0;) {
-		*--p;
+		--p;
 		if (*p == EOI)
 			*p = 0200;
 	}
diff --git a/usr.bin/more/linenum.c b/usr.bin/more/linenum.c
index c0d281664a3f..84fa04b0c097 100644
--- a/usr.bin/more/linenum.c
+++ b/usr.bin/more/linenum.c
@@ -222,6 +222,13 @@ add_lnum(line, pos)
 		 * we get to p->next == &anchor.  This also avoids
 		 * looking at the gap of the last one, which is
 		 * not computed by calcgap.
+		 *
+		 * XXX Should also ensure that we can determine the line
+		 *     number in the case where we are reading from a pipe
+		 *     and we no longer have the first block(s) of data from
+		 *     the pipe buffered in ch.c.  Further, keeping linenum
+		 *     entries for lines in this case that have been thrown-
+		 *     out of the buffer is fairly pointless.
 		 */
 		mingap = anchor.next->gap;
 		for (p = anchor.next;  p->next != &anchor;  p = p->next)