diff --git a/proto/importer.proto b/proto/importer.proto
index 2397e32..1ec491b 100644
--- a/proto/importer.proto
+++ b/proto/importer.proto
@@ -11,6 +11,7 @@
 	string ip_address = 1;
 	uint32 frequency = 2;
         string vendor = 3;
+	string protocol = 4;
 }
 
 message EventList {