diff --git a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
index 3ad3015d1..d8d8e3754 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
@@ -108,11 +108,12 @@ public final class Jid {
             if (resourcepart.isEmpty() || resourcepart.length() > 1023) {
                 throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
             }
-            dp = jid.substring(domainpartStart, slashLoc);
+            dp = IDN.toUnicode(jid.substring(domainpartStart, slashLoc), IDN.USE_STD3_ASCII_RULES);
             finaljid = finaljid + dp + "/" + rp;
         } else {
             resourcepart = "";
-            dp = jid.substring(domainpartStart, jid.length());
+            dp = IDN.toUnicode(jid.substring(domainpartStart, jid.length()),
+                    IDN.USE_STD3_ASCII_RULES);
             finaljid = finaljid + dp;
         }