diff --git a/doc/ChangeLog.md b/doc/ChangeLog.md
index 52015513..9f691bb1 100644
--- a/doc/ChangeLog.md
+++ b/doc/ChangeLog.md
@@ -10,6 +10,9 @@ All notable changes to the project are documented in this file.
 addresses for interfaces!  For details, see below issue #680.
 
 ### Changes
+- Correcting documentation on QoS. For packets containing both a VLAN
+  tag and an IP header, PCP priority takes precedence over DSCP
+  priority (not vice versa).
 - Update CONTRIBUTING.md for scaling core team and helping external
   contributors understand the development process, issue #672
 - OSPF: Add limitation to only allow one interface per area
diff --git a/doc/qos.md b/doc/qos.md
index 278810ca..1e52e4ae 100644
--- a/doc/qos.md
+++ b/doc/qos.md
@@ -54,8 +54,8 @@ significant bits of the DSCP is used to select the queue:
 |   6 | 48-55 | ⇒ |     6 |     25 |
 |   7 | 56-63 | ⇒ |     7 |     33 |
 
-For packets containing both a VLAN tag and an IP header, DSCP priority
-takes precedence over PCP priority. In cases where neither are
+For packets containing both a VLAN tag and an IP header, PCP priority
+takes precedence over DSCP priority. In cases where neither are
 available, packets are always assigned to queue 0.
 
 Each port's set of 8 egress queues operate on a Weighted Round Robin