diff --git a/changes/bug20117 b/changes/bug20117
new file mode 100644
index 0000000000000000000000000000000000000000..653226068bfddffb4031fd8f2029ed77361d56ce
--- /dev/null
+++ b/changes/bug20117
@@ -0,0 +1,6 @@
+  o Minor bugfixes (documentation):
+    - Document the default PathsNeededToBuildCircuits value that's
+      used by clients when the directory authorities don't set
+      min_paths_for_circs_pct.
+      Fixes bug 20117; bugfix on 02c320916e02 in tor-0.2.4.10-alpha.
+      Patch by teor, reported by Jesse V.
diff --git a/doc/tor.1.txt b/doc/tor.1.txt
index 1856592a9d720aadf4abba4a67bf7d7279fbed69..f53ff9499f82ea73f60bf82b64550591a7862c00 100644
--- a/doc/tor.1.txt
+++ b/doc/tor.1.txt
@@ -1558,8 +1558,9 @@ The following options are useful only for clients (that is, if
     that fraction of possible paths. Note that setting this option too low
     can make your Tor client less anonymous, and setting it too high can
     prevent your Tor client from bootstrapping.  If this option is negative,
-    Tor will use a default value chosen by the directory
-    authorities. (Default: -1.)
+    Tor will use a default value chosen by the directory authorities. If the
+    directory authorities do not choose a value, Tor will default to 0.6.
+    (Default: -1.)
 
 [[ClientBootstrapConsensusAuthorityDownloadSchedule]] **ClientBootstrapConsensusAuthorityDownloadSchedule** __N__,__N__,__...__::
     Schedule for when clients should download consensuses from authorities