diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index ca11fc8..4ddec34 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -626,12 +626,28 @@
     return true;
 }
 
+static bool cuda_cmd_set_file_server_flag(CUDAState *s,
+                                          const uint8_t *in_data, int in_len,
+                                          uint8_t *out_data, int *out_len)
+{
+    if (in_len != 1) {
+        return false;
+    }
+
+    qemu_log_mask(LOG_UNIMP,
+                  "CUDA: unimplemented command FILE_SERVER_FLAG %d\n",
+                  in_data[0]);
+    return true;
+}
+
 static const CudaCommand handlers[] = {
     { CUDA_AUTOPOLL, "AUTOPOLL", cuda_cmd_autopoll },
     { CUDA_SET_AUTO_RATE, "SET_AUTO_RATE",  cuda_cmd_set_autorate },
     { CUDA_SET_DEVICE_LIST, "SET_DEVICE_LIST", cuda_cmd_set_device_list },
     { CUDA_POWERDOWN, "POWERDOWN", cuda_cmd_powerdown },
     { CUDA_RESET_SYSTEM, "RESET_SYSTEM", cuda_cmd_reset_system },
+    { CUDA_FILE_SERVER_FLAG, "FILE_SERVER_FLAG",
+      cuda_cmd_set_file_server_flag },
 };
 
 static void cuda_receive_packet(CUDAState *s,
@@ -679,7 +695,6 @@
         obuf[6] = ti;
         cuda_send_packet_to_host(s, obuf, 7);
         return;
-    case CUDA_FILE_SERVER_FLAG:
     case CUDA_SET_POWER_MESSAGES:
         cuda_send_packet_to_host(s, obuf, 3);
         return;