diff --git a/docs/deployment/zero-downtime-deploys.md b/docs/deployment/zero-downtime-deploys.md
index 7ebee5124..8c9465579 100644
--- a/docs/deployment/zero-downtime-deploys.md
+++ b/docs/deployment/zero-downtime-deploys.md
@@ -123,7 +123,7 @@ To specify checks, add a `CHECKS` file to the root of your project directory. Th
 - comments (lines starting with #)
 - empty lines
 
-> For Dockerfile-based deploys, the file *must* be in `/app/CHECKS` within the container. `/app` is used by default as the root container directory for buildpack-based deploys.
+> For Dockerfile and Docker Image based deploys, the file *must* be in the `WORKDIR` directory of the built image. `/app` is used by default as the root container directory for buildpack-based deploys.
 
 ### Check instructions