diff --git a/docs/Garbage-Collector.md b/docs/Garbage-Collector.md
index e32e9eee..8d0dc808 100644
--- a/docs/Garbage-Collector.md
+++ b/docs/Garbage-Collector.md
@@ -195,9 +195,11 @@ This function is called by a mutator to allocate memory on the heap for an objec
 
 A write barrier is used to ensure any modified objects are properly marked for the current collection cycle. There are two cases:
 
-- Gray the object's new and old values if the mutator is in a synchronous status. Graying of the new value is a special case since it may still be on the stack. Instead of marking it directly, the object is tagged to be grayed when it is relocated to the heap.
+- Gray the object's new and old values if the mutator is in a synchronous status. 
 - Gray the object's old value if the collector is in the tracing stage.
 
+Because updates can occur at any time a modified object may still live on the stack. In this case the object is tagged to be grayed when it is relocated to the heap.
+
 ### Cooperate
 
 Each mutator is required to periodically call this function to cooperate with the collector. During cooperation a mutator will update its status to match the collector's status, to handshake with the collector.