diff --git a/app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt b/app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
index dc19cebca..7979d6adb 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
@@ -360,7 +360,7 @@ class Account(
     fun sendPost(message: String, replyTo: List<Note>?, mentions: List<User>?) {
         if (!isWriteable()) return
 
-        val repliesToHex = replyTo?.map { it.idHex }
+        val repliesToHex = replyTo?.filter { it.address() == null }?.map { it.idHex }
         val mentionsHex = mentions?.map { it.pubkeyHex }
         val addresses = replyTo?.mapNotNull { it.address() }