diff --git a/connection.go b/connection.go
index 7c82c8f..88ec7d4 100644
--- a/connection.go
+++ b/connection.go
@@ -24,7 +24,9 @@ type Conn interface {
 	AcceptTrans() (Trans, error)
 
 	// SetSizeLimit sets a limit (in bytes) for how large messages can be.
-	// By default, this limit is 1 megabyte.
+	// By default, this limit is 1 megabyte. Note that this is only
+	// enforced when sending and receiving byte slices, and it does not
+	// apply to [Trans.SendWriter] or [Trans.ReceiveReader].
 	SetSizeLimit(limit int64)
 }