diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index e6a12c9077..15e39f8bbb 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -273,7 +273,7 @@ The Nios II architecture is orphan.
 ''''''''''''''''''''
 
 The machine is no longer in existence and has been long unmaintained
-in QEMU.
+in QEMU. This also holds for the TC51828 16MiB flash that it uses.
 
 Backend options
 ---------------
diff --git a/hw/block/tc58128.c b/hw/block/tc58128.c
index d350126b27..6944cf58fa 100644
--- a/hw/block/tc58128.c
+++ b/hw/block/tc58128.c
@@ -202,6 +202,7 @@ static sh7750_io_device tc58128 = {
 
 int tc58128_init(struct SH7750State *s, const char *zone1, const char *zone2)
 {
+    warn_report_once("The TC58128 flash device is deprecated");
     init_dev(&tc58128_devs[0], zone1);
     init_dev(&tc58128_devs[1], zone2);
     return sh7750_register_io_device(s, &tc58128);