diff --git a/packages/rocketchat-slashcommands-mute/server/mute.js b/packages/rocketchat-slashcommands-mute/server/mute.js
index 38273ff18fee..21601cebe080 100644
--- a/packages/rocketchat-slashcommands-mute/server/mute.js
+++ b/packages/rocketchat-slashcommands-mute/server/mute.js
@@ -26,7 +26,7 @@ RocketChat.slashCommands.add('mute', function Mute(command, params, item) {
 		});
 		return;
 	}
-	if ((room.usernames || []).includes(username)) {
+	if ((room.usernames || []).includes(username) === false) {
 		RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
 			_id: Random.id(),
 			rid: item.rid,
diff --git a/packages/rocketchat-slashcommands-mute/server/unmute.js b/packages/rocketchat-slashcommands-mute/server/unmute.js
index c5a3f02cfa10..0d5d6a93e12e 100644
--- a/packages/rocketchat-slashcommands-mute/server/unmute.js
+++ b/packages/rocketchat-slashcommands-mute/server/unmute.js
@@ -26,7 +26,7 @@ RocketChat.slashCommands.add('unmute', function Unmute(command, params, item) {
 			}, user.language)
 		});
 	}
-	if ((room.usernames || []).includes(username)) {
+	if ((room.usernames || []).includes(username) === false) {
 		return RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
 			_id: Random.id(),
 			rid: item.rid,