diff --git a/src/mudlib/server.py b/src/mudlib/server.py
index 64503d0..1da3d30 100644
--- a/src/mudlib/server.py
+++ b/src/mudlib/server.py
@@ -233,8 +233,9 @@ class MudTelnetServer(TelnetServer):
         """Offer GMCP and MSDP alongside the standard options."""
         super().begin_advanced_negotiation()
         assert self.writer is not None
-        self.writer.iac(WILL, GMCP)
-        self.writer.iac(WILL, MSDP)
+        gmcp_ok = self.writer.iac(WILL, GMCP)
+        msdp_ok = self.writer.iac(WILL, MSDP)
+        log.debug("offered GMCP=%s MSDP=%s", gmcp_ok, msdp_ok)
 
 
 async def shell(