diff --git a/main.tf b/main.tf
index f654c33..0044cd0 100644
--- a/main.tf
+++ b/main.tf
@@ -201,7 +201,9 @@ resource "aws_ecs_task_definition" "this" {
       type           = "APPMESH"
 
       properties = {
-        AppPorts         = var.container_port
+        AppPorts = join(",", concat([tostring(var.container_port)], [
+          for x in var.extra_port_mappings : x.containerPort
+        ]))
         EgressIgnoredIPs = "169.254.170.2,169.254.169.254"
         IgnoredGID       = "1337"
         ProxyEgressPort  = 15001
diff --git a/variables.tf b/variables.tf
index 20cbb93..83ad418 100644
--- a/variables.tf
+++ b/variables.tf
@@ -327,7 +327,7 @@ variable "efs_volumes" {
 variable "extra_port_mappings" {
   default     = []
   description = "Additional ports to be exposed from the container."
-  type        = list(object({
+  type = list(object({
     hostPort      = number
     containerPort = number
     protocol      = optional(string, "tcp")