diff --git a/hgext/convert/__init__.py b/hgext/convert/__init__.py
--- a/hgext/convert/__init__.py
+++ b/hgext/convert/__init__.py
@@ -112,6 +112,15 @@
 configitem('convert', 'svn.debugsvnlog',
     default=True,
 )
+configitem('convert', 'svn.trunk',
+    default=None,
+)
+configitem('convert', 'svn.tags',
+    default=None,
+)
+configitem('convert', 'svn.branches',
+    default=None,
+)
 configitem('convert', 'svn.startrev',
     default=0,
 )
diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -352,8 +352,10 @@
                 raise error.Abort(_('svn: revision %s is not an integer') %
                                  revs[0])
 
-        self.trunkname = self.ui.config('convert', 'svn.trunk',
-                                        'trunk').strip('/')
+        trunkcfg = self.ui.config('convert', 'svn.trunk')
+        if trunkcfg is None:
+            trunkcfg = 'trunk'
+        self.trunkname = trunkcfg.strip('/')
         self.startrev = self.ui.config('convert', 'svn.startrev')
         try:
             self.startrev = int(self.startrev)