diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index a675d9259d..6108e07c25 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -5144,7 +5144,7 @@ The following video options are currently all specific to ``--vo=gpu`` and
         The user should independently guarantee this before using these signal
         formats for display.
 
-``--target-peak=<nits>``
+``--target-peak=<auto|nits>``
     Specifies the measured peak brightness of the output display, in cd/m^2
     (AKA nits). The interpretation of this brightness depends on the configured
     ``--target-trc``. In all cases, it imposes a limit on the signal values
@@ -5156,9 +5156,9 @@ The following video options are currently all specific to ``--vo=gpu`` and
     above 100 essentially causes the display to be treated as if it were an HDR
     display in disguise. (See the note below)
 
-    By default, the chosen peak defaults to an appropriate value based on the
-    TRC in use. For SDR curves, it defaults to 100. For HDR curves, it
-    defaults to 100 * the transfer function's nominal peak.
+    In ``auto`` mode (the default), the chosen peak is an appropriate value
+    based on the TRC in use. For SDR curves, it uses 100. For HDR curves, it
+    uses 100 * the transfer function's nominal peak.
 
     .. note::