diff --git a/docs/manpages/virsh.rst b/docs/manpages/virsh.rst
index d5b614dc03..26c328d390 100644
--- a/docs/manpages/virsh.rst
+++ b/docs/manpages/virsh.rst
@@ -2012,7 +2012,8 @@ interface stats are only available for interfaces that have a
 physical source interface. This does not include, for example, a
 'user' interface type since it is a virtual LAN with NAT to the
 outside world. *interface-device* can be the interface target by
-name or MAC address.
+name or MAC address. Please note, for an unmanaged *ethernet*
+type returned stats might have RX/TX swapped.
 
 
 domiftune
diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 3199a27065..379057d9a7 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -5965,6 +5965,9 @@ virDomainBlockStatsFlags(virDomainPtr dom,
  *
  * The returned stats are from domain's point of view.
  *
+ * Please note, for an unmanaged ethernet type, returned stats
+ * might have RX/TX swapped.
+ *
  * Returns: 0 in case of success or -1 in case of failure.
  *
  * Since: 0.3.2