diff --git a/src/iter/iter.go b/src/iter/iter.go
index 3eaeb9e1fd6f1f..23fd071e32877c 100644
--- a/src/iter/iter.go
+++ b/src/iter/iter.go
@@ -26,7 +26,7 @@ Seq2 represents a sequence of paired values, conventionally key-value
 or index-value pairs.
 
 Yield returns true if the iterator should continue with the next
-element in the sequence, false if it should stop.
+element in the sequence, false if it must stop.
 
 For instance, [maps.Keys] returns an iterator that produces the sequence
 of keys of the map m, implemented as follows:
@@ -51,6 +51,9 @@ Iterator functions are most often called by a [range loop], as in:
 		}
 	}
 
+If a [range loop] terminates, e.g. by a break statement, a subsequent call
+to yield inside the iterator causes a runtime panic.
+
 # Naming Conventions
 
 Iterator functions and methods are named for the sequence being walked: