diff --git a/ChangeLog b/ChangeLog
index 71e7d313..17a59226 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -26,8 +26,8 @@ version 3.21 ()
       rather than assuming they are the same.
     * Capture port VLANs on Cisco interfaces which are configured for
       trunking but are not in operational trunking mode
-    * Correct munging of dot1dStpPortDesignatedPort in stp_p_port() and
-      i_stp_port() methods
+    * Correct munging of stp_p_port(), i_stp_port(), and stp_root() methods
+      in Bridge
 
 version 3.20 (2014-09-08)
 
diff --git a/Info/Bridge.pm b/Info/Bridge.pm
index d3f3d5cd..e2aae8d4 100644
--- a/Info/Bridge.pm
+++ b/Info/Bridge.pm
@@ -125,7 +125,7 @@ $VERSION = '3.20';
     'b_mac'            => \&SNMP::Info::munge_mac,
     'fw_mac'           => \&SNMP::Info::munge_mac,
     'bs_mac'           => \&SNMP::Info::munge_mac,
-    'stp_root'         => \&SNMP::Info::munge_mac,
+    'stp_root'         => \&SNMP::Info::munge_prio_mac,
     'stp_p_root'       => \&SNMP::Info::munge_prio_mac,
     'stp_p_bridge'     => \&SNMP::Info::munge_prio_mac,
     'stp_p_port'       => \&SNMP::Info::munge_prio_port,