diff --git a/weaver/weave b/weaver/weave
index dc6dbc24..5d45c55e 100755
--- a/weaver/weave
+++ b/weaver/weave
@@ -118,9 +118,10 @@ container_netns_preamble() {
     [ ! -d /var/run/netns ] && mkdir -p /var/run/netns
     rm -f /var/run/netns/$NSPID
     ln -s /proc/$NSPID/ns/net /var/run/netns/$NSPID
+
+    EXITCODE=1
     LOCAL_IFNAME="v${CONTAINER_IFNAME}pl${NSPID}"
     GUEST_IFNAME="v${CONTAINER_IFNAME}pg${NSPID}"
-    EXITCODE=1
     IP_TMPFILE=/tmp/weave_ip_output_$$
     rm -f $IP_TMPFILE