diff --git a/vmstat.8 b/vmstat.8
index e408bca8..dcc1b1e9 100644
--- a/vmstat.8
+++ b/vmstat.8
@@ -93,7 +93,7 @@ Display help and exit.
 .B "Procs"
 .nf
 r: The number of runnable processes (running or waiting for run time).
-b: The number of processes in uninterruptible sleep.
+b: The number of processes blocked waiting for I/O to complete.
 .fi
 .PP
 .SS
diff --git a/watch.1 b/watch.1
index 256c36b7..e06e04e8 100644
--- a/watch.1
+++ b/watch.1
@@ -34,7 +34,7 @@ every
 .I interval
 seconds. Try it with
 .B ntptime
-and notice how the fractional seconds stays (nearly) the same, as opposed to
+(if present) and notice how the fractional seconds stays (nearly) the same, as opposed to
 normal mode where they continuously increase.
 .TP
 \fB\-t\fR, \fB\-\-no\-title\fR
@@ -190,4 +190,4 @@ watch uname \-r
 .I \-p
 isn't guaranteed to work across reboots, especially in the face of
 .B ntpdate
-or other bootup time-changing mechanisms)
+(if present) or other bootup time-changing mechanisms)