diff --git a/doc/manpages/qvm-features.rst b/doc/manpages/qvm-features.rst
index 63d522f5..18d8df83 100644
--- a/doc/manpages/qvm-features.rst
+++ b/doc/manpages/qvm-features.rst
@@ -449,6 +449,17 @@ feature until it is deleted.
 | **Type**: `int`
 | **Default**: `0`
 
+preload-dispvm-threshold
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The amount in MiB of free system memory that will never be used for preloading
+disposables. Ensures preloaded disposables do not consume all available memory.
+
+|
+| **Valid on**: dom0
+| **Type**: `int`
+| **Default**: `0`
+
 preload-dispvm
 ^^^^^^^^^^^^^^
 
diff --git a/qubesadmin/tests/mock_app.py b/qubesadmin/tests/mock_app.py
index 4294ab91..64ce9505 100644
--- a/qubesadmin/tests/mock_app.py
+++ b/qubesadmin/tests/mock_app.py
@@ -233,6 +233,7 @@ def default_string(self):
     "last-update",
     "prohibit-start",
     "preload-dispvm-max",
+    "preload-dispvm-threshold",
     "preload-dispvm",
     "preload-dispvm-in-progress",
     "preload-dispvm-completed",