diff --git a/roaring.go b/roaring.go
index 46a74a88..cdf543ce 100644
--- a/roaring.go
+++ b/roaring.go
@@ -135,8 +135,6 @@ func (rb *Bitmap) ReadFrom(reader io.Reader, cookieHeader ...byte) (p int64, err
 		stream = byteInputAdapter
 	}
 
-	// We pass false to readFrom to indicate that we don't want to resulting containers to be copy-on-write.
-	// They are regular, mutable containers.
 	p, err = rb.highlowcontainer.readFrom(stream, cookieHeader...)
 
 	if !ok {
diff --git a/roaringarray.go b/roaringarray.go
index c325630f..079195dd 100644
--- a/roaringarray.go
+++ b/roaringarray.go
@@ -551,10 +551,7 @@ func (ra *roaringArray) toBytes() ([]byte, error) {
 	return buf.Bytes(), err
 }
 
-// Reads a serialized roaringArray from a byte slice. If we are pointing at a raw buffer that must be immutable, then
-// the parameter willNeedCopyOnWrite should be set to true (e.g., if the buffer is mmapped). Otherwise, if reading from
-// a file or from the network into a temporary buffer, then set willNeedCopyOnWrite should be set to false because the
-// resulting buffers are owned by the newly created roaringArray.
+// Reads a serialized roaringArray from a byte slice.
 func (ra *roaringArray) readFrom(stream internal.ByteInput, cookieHeader ...byte) (int64, error) {
 	var cookie uint32
 	var err error