diff --git a/bsip-0038.md b/bsip-0038.md
index 7a16725..0c479af 100644
--- a/bsip-0038.md
+++ b/bsip-0038.md
@@ -141,10 +141,11 @@ Generally, when two orders got matched, the order matching engine will favor
 the larger order while rounding.
 
 When a call order got matched with a limit order, if the call order has no
-`target_CR` option set, or has `target_CR` option set but covering debt is
-smaller than maximum debt to cover, both means the call order is larger,
-so its paid collateral will be rounded down, so its collateral ratio will
-increase after partially filled.
+`target_CR` option set but its debt is more than the limit order offered,
+or the call order has `target_CR` option set but `max_debt_to_cover`
+is more than the limit order offered, both means the call order is larger,
+according to the rounding rule, the call order's paid collateral will be
+rounded down, so its collateral ratio will increase after partially filled.
 
 If the call order has `target_CR` option set and is covering the whole "maximum
 debt to cover", to be fair, we should consider that part of call order to be