diff --git a/doc/tor.1.txt b/doc/tor.1.txt
index 6480adbd9..e136bd0f7 100644
--- a/doc/tor.1.txt
+++ b/doc/tor.1.txt
@@ -1123,7 +1123,7 @@ The following options are useful only for clients (that is, if
     This torrc option specifies whether clients should use the
     guardfraction information found in the consensus during path
     selection. If it's set to 'auto', clients will do what the
-    UseGuardFraction consensus parameter tells them to do.
+    UseGuardFraction consensus parameter tells them to do. (Default: auto)
 
 [[NumEntryGuards]] **NumEntryGuards** __NUM__::
     If UseEntryGuards is set to 1, we will try to pick a total of NUM routers