diff --git a/py25/bacpypes/comm.py b/py25/bacpypes/comm.py
index 72b5e74..152dc0d 100755
--- a/py25/bacpypes/comm.py
+++ b/py25/bacpypes/comm.py
@@ -267,6 +267,8 @@ class Client:
                 bind(self, server)
 
     def request(self, *args, **kwargs):
+        if _debug: Client._debug("request %r %r", args, kwargs)
+
         if not self.clientPeer:
             raise ConfigurationError("unbound client")
         self.clientPeer.indication(*args, **kwargs)
@@ -304,6 +306,8 @@ class Server:
         raise NotImplementedError("indication must be overridden")
 
     def response(self, *args, **kwargs):
+        if _debug: Server._debug("response %r %r", args, kwargs)
+
         if not self.serverPeer:
             raise ConfigurationError("unbound server")
         self.serverPeer.confirmation(*args, **kwargs)
diff --git a/py34/bacpypes/comm.py b/py34/bacpypes/comm.py
index b653819..d0b4a31 100755
--- a/py34/bacpypes/comm.py
+++ b/py34/bacpypes/comm.py
@@ -275,6 +275,8 @@ class Client:
                 bind(self, server)
 
     def request(self, *args, **kwargs):
+        if _debug: Client._debug("request %r %r", args, kwargs)
+
         if not self.clientPeer:
             raise ConfigurationError("unbound client")
         self.clientPeer.indication(*args, **kwargs)
@@ -311,6 +313,8 @@ class Server:
         raise NotImplementedError("indication must be overridden")
 
     def response(self, *args, **kwargs):
+        if _debug: Server._debug("response %r %r", args, kwargs)
+
         if not self.serverPeer:
             raise ConfigurationError("unbound server")
         self.serverPeer.confirmation(*args, **kwargs)