dnstap.mk: another shot at Travis failures

I'm sorry.  I'm not certain about this and don't like to invest much
time into it.

diff --git a/modules/dnstap/dnstap.proto b/modules/dnstap/dnstap.proto
index 22784cd0691b92ff2964181cd13234c361366aa2..ed87c6584a51c9fdf25bc490c681eae9a12fb5c6 100644 (file)
--- a/modules/dnstap/dnstap.proto
+++ b/modules/dnstap/dnstap.proto
@@ -14,6 +14,7 @@
 //
 // <http://creativecommons.org/publicdomain/zero/1.0/>.
 
+syntax = "proto2";
 package dnstap;
 
 // "Dnstap": this is the top-level dnstap type, which is a "union" type that