diff --git a/.travis.yml b/.travis.yml
index cabd45a2e5f97f8b951911a4148d7b1fb9b608e0..bbe8fb3001cbd0f61568e339a42b12af05c68ff7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: go
 go:
+  - 1.6
   - 1.7
   - 1.x
 go_import_path: google.golang.org/genproto