diff --git a/backends/server/command.c b/backends/server/command.c
index 0e10b08e..a58f118e 100644
--- a/backends/server/command.c
+++ b/backends/server/command.c
@@ -63,9 +63,16 @@ glibtop_call_i (glibtop *server, glibtop_backend *backend, unsigned command,
     } else {
 	cmnd.send_size = send_size;
     }
+
+    cmnd.data_size = data_size;
 	
     glibtop_write_i (server, backend, sizeof (glibtop_command), &cmnd);
 
+    if (data_size) {
+	fprintf (stderr, "SENDING %d bytes of DATA.\n", data_size);
+	glibtop_write_i (server, backend, data_size, data_buf);
+    }
+
     glibtop_read_i (server, backend, sizeof (glibtop_response), &resp);
 
     fprintf (stderr, "RESPONSE: %d - %d - %ld - %ld - %p - %ld\n",
diff --git a/backends/server/server.c b/backends/server/server.c
index e738610d..3cf23158 100644
--- a/backends/server/server.c
+++ b/backends/server/server.c
@@ -108,12 +108,13 @@ void
 handle_slave_connection (int input, int output)
 {
     glibtop_command _cmnd, *cmnd = &_cmnd;
+    glibtop *server = glibtop_global_server;
 
     // glibtop_send_version_i (glibtop_global_server, output);
 
     while (do_read (input, cmnd, sizeof (glibtop_command))) {
 	size_t recv_size = 0, send_size = 0, recv_data_size = 0;
-	void *recv_ptr = NULL, *recv_data_ptr = NULL;
+	void *recv_ptr = NULL, *recv_data_ptr = NULL, *data_ptr = NULL;
 	char parameter [BUFSIZ];
 	int retval, func_retval;
 	glibtop_response resp;
@@ -147,9 +148,18 @@ handle_slave_connection (int input, int output)
 	    memcpy (parameter, cmnd->parameter, send_size);
 	}
 
-	retval = glibtop_demarshal_func_i (glibtop_global_server, NULL,
-					   cmnd->command, parameter,
-					   send_size, NULL, 0,
+	if (cmnd->data_size) {
+	    fprintf (stderr, "CLIENT has %d bytes of extra data for us.\n",
+		     cmnd->data_size);
+
+	    data_ptr = glibtop_malloc_r (server, cmnd->data_size);
+	    do_read (input, data_ptr, cmnd->data_size);
+	}
+
+	retval = glibtop_demarshal_func_i (server, NULL,
+					   cmnd->command,
+					   parameter, send_size,
+					   data_ptr, cmnd->data_size,
 					   &recv_ptr, &recv_size,
 					   &recv_data_ptr, &recv_data_size,
 					   &func_retval);