dynu: Fix updating if no IPv6 address is available.

diff --git a/src/ddns/providers.py b/src/ddns/providers.py
index aeca64dfb3c5415245d436d361a8ae441a114beb..4e35a9960a96390fc4f470b4149c49a078cac4e4 100644 (file)
--- a/src/ddns/providers.py
+++ b/src/ddns/providers.py
@@ -516,9 +516,11 @@ class DDNSProviderDynU(DDNSProtocolDynDNS2, DDNSProvider):
                data = DDNSProtocolDynDNS2._prepare_request_data(self)
 
                # This one supports IPv6
-               data.update({
-                       "myipv6"   : self.get_address("ipv6"),
-               })
+               myipv6 = self.get_address("ipv6")
+
+               # Add update information if we have an IPv6 address.
+               if myipv6:
+                       data["myipv6"] = myipv6
 
                return data