diff --git a/doc/man/tor.1.txt b/doc/man/tor.1.txt
index ade151a2f3..8a3d7a7cf6 100644
--- a/doc/man/tor.1.txt
+++ b/doc/man/tor.1.txt
@@ -2453,11 +2453,12 @@ is non-zero):
 [[MaxHSDirCacheBytes]] **MaxHSDirCacheBytes** __N__ **bytes**|**KBytes**|**MBytes**|**GBytes**::
     This option configures a threshold of Hidden Service Directory memory
     consumption above which your Tor relay will begin to prune the least-frequently
-    accessed hidden service descriptors from the relay's HSDir cache. This pruning used
-    to be done as part of MaxMemInQueues, but it has been decoupled to allow more
-    fine-grained control of descriptor cache size under DDoS conditions. This
-    option defaults to 20% of the MaxMemInQueues size, which itself defaults to
-    an automatically determined value based on system memory. (Default: 20% MaxMemInQueues)
+    accessed hidden service descriptors from the relay's HSDir cache.
+    If set to 0, this will default to 20% of MaxMemInQueues. (Default: 0) +
+     +
+    This pruning used to be done as part of MaxMemInQueues, but it has been
+    decoupled to allow more fine-grained control of descriptor cache size under
+    DDoS conditions.
 
 [[MaxMemInQueues]] **MaxMemInQueues**  __N__ **bytes**|**KBytes**|**MBytes**|**GBytes**::
     This option configures a threshold above which Tor will assume that it