diff --git a/deltachat/const.go b/deltachat/const.go
index 7da9ab4..becf6f4 100644
--- a/deltachat/const.go
+++ b/deltachat/const.go
@@ -31,13 +31,6 @@ const (
 	ContactFlagVerifiedOnly ContactFlag = 0x01
 	ContactFlagAddSelf      ContactFlag = 0x02
 
-	//Chat types
-	ChatUndefined   ChatType = 0
-	ChatSingle      ChatType = 100
-	ChatGroup       ChatType = 120
-	ChatMailinglist ChatType = 140
-	ChatBroadcast   ChatType = 160
-
 	// Chat visibility types
 	ChatVisibilityNormal   ChatVisibility = "Normal"
 	ChatVisibilityArchived ChatVisibility = "Archived"
@@ -92,3 +85,14 @@ const (
 	SysmsgMultiDeviceSync          SysmsgType = "MultiDeviceSync"
 	SysmsgWebxdcInfoMessage        SysmsgType = "WebxdcInfoMessage"
 )
+
+const (
+	ChatSingle       ChatType = "Single"
+	ChatGroup        ChatType = "Group"
+	ChatMailinglist  ChatType = "Mailinglist"
+	ChatOutBroadcast ChatType = "OutBroadcast"
+	ChatInBroadcast  ChatType = "InBroadcast"
+
+	// Deprecated: use "ChatOutBroadcast" instead
+	ChatBroadcast ChatType = ChatOutBroadcast
+)
diff --git a/deltachat/types.go b/deltachat/types.go
index 8f1e261..0247b25 100644
--- a/deltachat/types.go
+++ b/deltachat/types.go
@@ -13,7 +13,7 @@ type MsgId uint64
 type ChatId uint64
 
 // Values in const.go
-type ChatType uint
+type ChatType string
 
 type Account struct {
 	// Configured