diff --git a/fints4k/src/main/kotlin/net/dankito/fints/messages/MessageBuilder.kt b/fints4k/src/main/kotlin/net/dankito/fints/messages/MessageBuilder.kt
index 72fa9cbf..e888d884 100644
--- a/fints4k/src/main/kotlin/net/dankito/fints/messages/MessageBuilder.kt
+++ b/fints4k/src/main/kotlin/net/dankito/fints/messages/MessageBuilder.kt
@@ -264,8 +264,6 @@ open class MessageBuilder(protected val generator: ISegmentNumberGenerator = Seg
 
     open fun rebuildMessage(message: MessageBuilderResult, dialogContext: DialogContext): MessageBuilderResult {
 
-        dialogContext.increaseMessageNumber()
-
         return createSignedMessageBuilderResult(dialogContext, message.messageBodySegments)
     }