diff --git a/man/man8/zpool-iostat.8 b/man/man8/zpool-iostat.8
index 5dd9c9d55..4abe08950 100644
--- a/man/man8/zpool-iostat.8
+++ b/man/man8/zpool-iostat.8
@@ -67,8 +67,8 @@ If
 is specified, the command exits after
 .Ar count
 reports are printed.
-The first report printed is always the statistics since boot regardless of
-whether
+The first report printed is always the average per-second
+statistics since boot regardless of whether
 .Ar interval
 and
 .Ar count