diff --git a/docs/development/plugin-triggers.md b/docs/development/plugin-triggers.md
index 6a29e92b7..0fba2a33a 100644
--- a/docs/development/plugin-triggers.md
+++ b/docs/development/plugin-triggers.md
@@ -408,7 +408,7 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 
 - Description: Return the port for a given app container
 - Invoked by: `internally triggered by a deploy`
-- Arguments: `$APP $PROC_TYPE $CONTAINER_ID`
+- Arguments: `$APP $PROC_TYPE $CONTAINER_ID $IS_HEROKUISH_CONTAINER`
 - Example:
 
 ```shell
diff --git a/plugins/common/functions b/plugins/common/functions
index e0d020c3c..5a8b5ed28 100755
--- a/plugins/common/functions
+++ b/plugins/common/functions
@@ -611,7 +611,7 @@ dokku_deploy_cmd() {
       fi
 
       ipaddr=$(plugn trigger network-get-ipaddr "$APP" "$PROC_TYPE" "$id")
-      port=$(plugn trigger network-get-port "$APP" "$PROC_TYPE" "$id")
+      port=$(plugn trigger network-get-port "$APP" "$PROC_TYPE" "$id" "$DOKKU_HEROKUISH")
 
       kill_new() {
         declare desc="wrapper function to kill newly started app container"
diff --git a/plugins/network/functions b/plugins/network/functions
index ba46fd5ad..ee195b774 100755
--- a/plugins/network/functions
+++ b/plugins/network/functions
@@ -111,7 +111,7 @@ network-get-container-listeners() {
 
 network-get-container-port() {
   declare desc="Return the port for a given app container"
-  declare APP="$1" PROC_TYPE="$2" CONTAINER_ID="$3" DOKKU_HEROKUISH="$4"
+  declare APP="$1" PROC_TYPE="$2" CONTAINER_ID="$3" IS_HEROKUISH_CONTAINER="$4"
   local DOKKU_IS_APP_PROXY_ENABLED
   local PORT=5000
 
@@ -119,7 +119,7 @@ network-get-container-port() {
     return
   fi
 
-  if [[ -z "$DOKKU_HEROKUISH" ]]; then
+  if [[ -z "$IS_HEROKUISH_CONTAINER" ]]; then
     local DOKKU_DOCKERFILE_PORTS=($(config_get "$APP" DOKKU_DOCKERFILE_PORTS || true))
   fi