diff --git a/wpa_supplicant/dbus/dbus_new_helpers.c b/wpa_supplicant/dbus/dbus_new_helpers.c
index 37516e655..58fdb9470 100644
--- a/wpa_supplicant/dbus/dbus_new_helpers.c
+++ b/wpa_supplicant/dbus/dbus_new_helpers.c
@@ -388,8 +388,9 @@ static DBusHandlerResult message_handler(DBusConnection *connection,
 	if (!method || !path || !msg_interface)
 		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 
-	wpa_printf(MSG_MSGDUMP, "dbus: %s.%s (%s)",
-		   msg_interface, method, path);
+	wpa_printf(MSG_MSGDUMP, "dbus: %s.%s (%s) [%s]",
+		   msg_interface, method, path,
+		   dbus_message_get_signature(message));
 
 	/* if message is introspection method call */
 	if (!os_strncmp(WPA_DBUS_INTROSPECTION_METHOD, method,
diff --git a/wpa_supplicant/dbus/dbus_old.c b/wpa_supplicant/dbus/dbus_old.c
index a86d39f45..055809c2c 100644
--- a/wpa_supplicant/dbus/dbus_old.c
+++ b/wpa_supplicant/dbus/dbus_old.c
@@ -216,6 +216,10 @@ static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
 	if (!msg_interface)
 		goto out;
 
+	wpa_printf(MSG_MSGDUMP, "dbus[old/iface]: %s.%s (%s) [%s]",
+		   msg_interface, method, path,
+		   dbus_message_get_signature(message));
+
 	iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
 	                                                 &bssid);
 	if (iface_obj_path == NULL) {
@@ -328,6 +332,10 @@ static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 	if (!method || !path || !ctrl_iface || !msg_interface)
 		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 
+	wpa_printf(MSG_MSGDUMP, "dbus[old]: %s.%s (%s) [%s]",
+		   msg_interface, method, path,
+		   dbus_message_get_signature(message));
+
 	/* Validate the method interface */
 	if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 		return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;