diff --git a/bridge/slack/helpers.go b/bridge/slack/helpers.go
index 68f6d799..952d0890 100644
--- a/bridge/slack/helpers.go
+++ b/bridge/slack/helpers.go
@@ -266,15 +266,12 @@ var (
 	channelRE  = regexp.MustCompile(`<#[a-zA-Z0-9]+\|(.+?)>`)
 	variableRE = regexp.MustCompile(`<!((?:subteam\^)?[a-zA-Z0-9]+)(?:\|@?(.+?))?>`)
 	urlRE      = regexp.MustCompile(`<(.*?)(\|.*?)?>`)
-	topicOrPurposeRE    = regexp.MustCompile(`(?s)^@.+ set the channel (topic|purpose): (.+?)(\[nosync\])?$`)
+	topicOrPurposeRE    = regexp.MustCompile(`(?s)^@.+ set the channel (topic|purpose): (.+?)$`)
 )
 
 func (b *Bslack) extractTopicOrPurpose(text string) (updateType string, extracted string) {
 	r := topicOrPurposeRE.FindStringSubmatch(text)
-	updateType, extracted, noSync := r[1], r[2], r[3]
-	if noSync != "" {
-		return "nosync", ""
-	}
+	updateType, extracted = r[1], r[2]
 	return updateType, extracted
 }
 
diff --git a/bridge/slack/slack.go b/bridge/slack/slack.go
index ee8d76fa..bc40756f 100644
--- a/bridge/slack/slack.go
+++ b/bridge/slack/slack.go
@@ -293,8 +293,6 @@ func (b *Bslack) sendRTM(msg config.Message) (string, error) {
 				break
 			}
 			b.rtm.SetPurposeOfConversation(channelInfo.ID, text)
-		case "nosync":
-			break
 		}
 		return "", nil
 	}
diff --git a/gateway/gateway.go b/gateway/gateway.go
index 72a0f6a6..3f279dfa 100644
--- a/gateway/gateway.go
+++ b/gateway/gateway.go
@@ -269,9 +269,17 @@ func (gw *Gateway) handleMessage(msg config.Message, dest *bridge.Bridge) []*BrM
 
 	// only relay topic change when configured
 	if msg.Event == config.EventTopicChange && !gw.Bridges[dest.Account].GetBool("ShowTopicChange") {
-		return brMsgIDs
+		// don't relay topic/purpose change if disabled
+		if !gw.Bridges[dest.Account].GetBool("ShowTopicChange") {
+			return brMsgIDs
+		}
+		// don't relay topic/purpose update if sync is enabled, but msg marked as nosync
+		if gw.Bridges[dest.Account].GetBool("SyncTopicChange") && strings.HasSuffix(msg.Text, "[nosync]") {
+			return brMsgIDs
+		}
 	}
 
+
 	// broadcast to every out channel (irc QUIT)
 	if msg.Channel == "" && msg.Event != config.EventJoinLeave {
 		flog.Debug("empty channel")