diff --git a/doc/channel.qbk b/doc/channel.qbk
index 8122f42e..4e393f0a 100644
--- a/doc/channel.qbk
+++ b/doc/channel.qbk
@@ -266,16 +266,15 @@ time as (system time + `timeout_duration`).
         bounded_channel( std::size_t hwm, std::size_t lwm);
 
 [variablelist
-[[Preconditions:] [`hwm >= lwm`]]
+[[Preconditions:] [`hwm > lwm`]]
 [[Effects:] [Constructs an object of class `bounded_channel`. The constructor
 with two arguments constructs an object of class `bounded_channel` with a
 high-watermark of `hwm` and a low-watermark of `lwm` items. The constructor
-with one argument effectively sets both `hwm` and `lwm` to the same value
-`wm`.]]
-[[Throws:] [`invalid_argument` if `lwm > hwm`.]]
+with one argument is effectively the same as `bounded_channel(wm, (wm-1))`.]]
+[[Throws:] [`invalid_argument` if `lwm >= hwm`.]]
 [[Notes:] [Once the number of values in the channel reaches `hwm`, any call to
 `push()`, `push_wait_for()` or `push_wait_until()` will block until the number
-of values in the channel has dropped below `lwm`. That is, if `lwm < hwm`, the
+of values in the channel is at most `lwm`. That is, if `lwm < (hwm-1)`, the
 channel can be in a state in which `push()`, `push_wait_for()` or `push_wait_until()`
 calls will block (channel is full) even though the number of values
 in the channel is less than `hwm`.]]
@@ -303,7 +302,7 @@ in the channel is less than `hwm`.]]
 
 [template bounded_channel_push_effects[or] [xchannel_push_effects If channel
 is not full, enqueues] Otherwise the calling fiber is suspended until
-the number of values in the channel drops below `lwm` (return value
+the number of values in the channel drops to `lwm` (return value
 `success`)[or] the channel is `close()`d (return value `closed`)]
 
 [member_heading bounded_channel..push]
@@ -361,7 +360,7 @@ time_point (return value `timeout`).]]
 ]
 
 [template bounded_pop_unblocking[] Once the number of items remaining in the
-channel drops below `lwm`, any fibers blocked on `push()`, `push_wait_for()`
+channel drops to `lwm`, any fibers blocked on `push()`, `push_wait_for()`
 or `push_wait_until()` may resume.]
 
 [xchannel_pop bounded_channel... [bounded_pop_unblocking]]