diff --git a/.travis.yml b/.travis.yml
index 257211b..a400d11 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,3 +25,8 @@ script:
 
 after_success:
 - (cd tarpc && travis-cargo coveralls --no-sudo)
+
+env:
+  global:
+    # override the default `--features unstable` used for the nightly branch
+    - TRAVIS_CARGO_NIGHTLY_FEATURE=""