diff --git a/doc/ci/variables/index.md b/doc/ci/variables/index.md
index 6a077d21419583a039ce66b39bddad6b9d4e3532..7b93d56318b1e65e3c7e9bedd9053e17cadaa52b 100644
--- a/doc/ci/variables/index.md
+++ b/doc/ci/variables/index.md
@@ -651,7 +651,7 @@ To also reference the variable in other stages, write the variable to both the `
 build-job:
   stage: build
   script:
-    - echo "ARCH=$(arch)" | tee >> $GITLAB_ENV build.env
+    - echo "ARCH=$(arch)" | tee -a $GITLAB_ENV >> build.env
     - touch some-file-$(arch)
   artifacts:
     paths: