diff --git a/cty/value_ops.go b/cty/value_ops.go
index c4584bd9..70e5b72b 100644
--- a/cty/value_ops.go
+++ b/cty/value_ops.go
@@ -1198,8 +1198,9 @@ func (val Value) ElementIterator() ElementIterator {
 	return elementIterator(val)
 }
 
-// CanIterateElements returns true if the receiver can support the
+// CanIterateElements returns true if the receiver type can support the
 // ElementIterator method (and by extension, ForEachElement) without panic.
+// Note this method will panic if the receiver is Unknown or null.
 func (val Value) CanIterateElements() bool {
 	return canElementIterator(val)
 }