diff --git a/rtc_base/copy_on_write_buffer.h b/rtc_base/copy_on_write_buffer.h
index d0954adec7..c7df325624 100644
--- a/rtc_base/copy_on_write_buffer.h
+++ b/rtc_base/copy_on_write_buffer.h
@@ -29,7 +29,7 @@ class CopyOnWriteBuffer {
  public:
   // An empty buffer.
   CopyOnWriteBuffer();
-  // Copy size and contents of an existing buffer.
+  // Share the data with an existing buffer.
   CopyOnWriteBuffer(const CopyOnWriteBuffer& buf);
   // Move contents from an existing buffer.
   CopyOnWriteBuffer(CopyOnWriteBuffer&& buf);