--- a/hgext/convert/subversion.py	Thu Dec 23 13:23:20 2010 -0600
+++ b/hgext/convert/subversion.py	Wed Dec 22 13:25:00 2010 -0600
@@ -914,7 +914,7 @@
         arg = encodeargs(args)
         hgexe = util.hgexecutable()
         cmd = '%s debugsvnlog' % util.shellquote(hgexe)
-        stdin, stdout = util.popen2(cmd)
+        stdin, stdout = util.popen2(util.quotecommand(cmd))
         stdin.write(arg)
         try:
             stdin.close()