diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,11 @@
 
+50200.10.1
+==========
+
+Bug fixes:
+ * Muted channels no longer appear to have unread messages when a
+   message in such a channel is edited (#655)
+
 50200.10.0
 ==========
 
diff --git a/matterhorn.cabal b/matterhorn.cabal
--- a/matterhorn.cabal
+++ b/matterhorn.cabal
@@ -1,5 +1,5 @@
 name:                matterhorn
-version:             50200.10.0
+version:             50200.10.1
 synopsis:            Terminal client for the Mattermost chat system
 description:         This is a terminal client for the Mattermost chat
                      system. Please see the README for a list of
diff --git a/src/Types.hs b/src/Types.hs
--- a/src/Types.hs
+++ b/src/Types.hs
@@ -502,8 +502,8 @@
     lastViewTime <- _cdViewed info
     return $ _cdMentionCount info > 0 ||
              (not (isMuted chan) &&
-              ((_cdUpdated info) > lastViewTime) ||
-              (isJust $ _cdEditedMessageThreshold info))
+              (((_cdUpdated info) > lastViewTime) ||
+               (isJust $ _cdEditedMessageThreshold info)))
 
 mkChannelZipperList :: UTCTime
                     -> Config