+++ b/qapi/block-core.json
@@ -2830,7 +2830,8 @@
#
# @cache-clean-interval: clean unused entries in the L2 and refcount
# caches. The interval is in seconds. The default
value
-# is 0 and it disables this feature (since 2.5)
+# is 30. (since 2.5)
+#
# @encrypt: Image decryption options. Mandatory for
# encrypted images, except when doing a metadata-only
# probe of the image. (since 2.10)
diff --git a/qemu-options.hx b/qemu-options.hx
index d6e15b2f06..0cda3d3c3a 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -767,7 +767,7 @@ it which is not used for the L2 cache)
@item cache-clean-interval
Clean unused entries in the L2 and refcount caches. The interval is in
seconds.
-The default value is 0 and it disables this feature.
+The default value is 30.