helper/http | 2 +-

diff --git a/helper/http b/helper/http
index cb3ad6caf5f80473b49296153cdb5ea1b236e9b7..425843a28ab7930e5edb57b88fba1c39a560f9ab 100755
--- a/helper/http
+++ b/helper/http
@@ -4,7 +4,7 @@ domain=`echo "$1" | cut -d/ -f3 | cut -d: -f1`
 "$SGMONDIR"/helper/all-addrs $domain | while read addr ; do
     bad=0
     curl \
-        --connect-to "::$addr:" \
+        --connect-to "::[$addr]:" \
         --range 0-100 \
         --max-time 60 \
         --verbose "$1" >state/curl-out 2>&1 || bad=1