diff --git a/.travis.yml b/.travis.yml
index 413881a1..f3094b04 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,13 +9,13 @@ go:
 matrix:
   include:
   - go: 1.9.x
-    env: ARCH=386
+    env: GOARCH=386
 
 go_import_path: google.golang.org/grpc
 
 before_install:
-  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$ARCH" != "386" ]]; then ./vet.sh -install || exit 1; fi
+  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$GOARCH" != "386" ]]; then ./vet.sh -install || exit 1; fi
 
 script:
-  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$ARCH" != "386" ]]; then ./vet.sh || exit 1; fi
+  - if [[ "$TRAVIS_GO_VERSION" = 1.9* && "$GOARCH" != "386" ]]; then ./vet.sh || exit 1; fi
   - make test testrace