diff --git a/.travis.yml b/.travis.yml
index 6d690463..bb438884 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -64,7 +64,7 @@ matrix:
         skip_cleanup: true
 
     - name: docker
-      if: type != pull_request AND (branch = master OR tag = true)
+      if: type != pull_request AND (branch = master OR tag IS present)
       go:
         - 1.11.x
       os: