diff --git a/README.md b/README.md
index ac07eb3..0bc1a2e 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,15 @@ $ git push https://git.heroku.com/example-2.git HEAD:master
 
 When example-1 builds, it'll copy Procfile into /app/Procfile, and when example-2 builds, it'll copy backend/Procfile to /app/Procfile. For example-2, the process types available for you to scale up will be the ones referenced (originally) in backend/Procfile.
 
+## Appending partial `Procfile`s
+
+One or more files may be appended to the `Procfile` by defining them in a comma separated list
+in the `PROCFILE_APPEND` environment variable.
+
+```bash
+PROCFILE_APPEND=Procfile_a,Procfile_b
+```
+
 ## Pipelines
 
 Only **builds** will set the proper Procfile. If you use [Heroku Pipelines](https://devcenter.heroku.com/articles/pipelines), then promoting a slug downstream will not trigger a build, and therefore will not look at the environment variable and act accordingly. Make sure that the proper Procfile is referenced all the way upstream to the first stage that builds.
diff --git a/bin/compile b/bin/compile
index fe54557..cbd5e65 100755
--- a/bin/compile
+++ b/bin/compile
@@ -24,6 +24,21 @@ fi
 
 echo "Copied ${PROCFILE} as Procfile successfully" | indent
 
+PROCFILE_APPEND=$(cat "${ENV_DIR}/PROCFILE_APPEND")
+
+for procfile_addition in ${PROCFILE_APPEND//,/ }
+do
+    if [[ ! -f "${BUILD_DIR}/${procfile_addition}" ]]; then
+        echo "FAILED to locate file: ${procfile_addition}" | indent
+        exit 1
+    fi
+
+    printf "\n# Contents of ${procfile_addition} appended below:\n" >> "${BUILD_DIR}/Procfile"
+    cat "${BUILD_DIR}/${procfile_addition}" >> "${BUILD_DIR}/Procfile"
+
+    echo "Appended contents of ${procfile_addition} to Procfile" | indent
+done
+
 APP_DIR=$(dirname "${BUILD_DIR}/${PROCFILE}")
 
 if [[ -f "${APP_DIR}/app.json" ]]; then