diff --git a/top/top.1 b/top/top.1
index 82b8783f..ae21893e 100644
--- a/top/top.1
+++ b/top/top.1
@@ -636,6 +636,11 @@ those unseen children.
 \*(XT 4c. TASK AREA Commands, CONTENT for more information regarding
 the `V' and `v' toggles.
 
+.TP 4
+\fB%CUC \*(Em \*(PU Utilization \fR
+This field is identical to %CUU below, except the percentage also
+reflects reaped child processes.
+
 .TP 4
 \fB%CUU \*(Em \*(PU Utilization \fR
 A task's total \*(PU usage divided by its elapsed running time,