diff --git a/salt/pcap/files/config b/salt/pcap/files/config
index 6998a27ff..8a4548ea4 100644
--- a/salt/pcap/files/config
+++ b/salt/pcap/files/config
@@ -1,4 +1,4 @@
-{%- set interface = salt['pillar.get'](sensors:interface) %}
+{%- set interface = salt['pillar.get']('sensors:interface', '') %}
 {
   "Threads": [
     { "PacketsDirectory": "/nsm/pcap"