diff --git a/lambda-slack.tf b/lambda-slack.tf
index a31c26d..1c91bd1 100644
--- a/lambda-slack.tf
+++ b/lambda-slack.tf
@@ -62,7 +62,7 @@ resource "aws_lambda_function" "default" {
   count = var.slack_endpoint == "" ? 0 : 1
 
   filename      = "${path.module}/slack.zip"
-  function_name = "slack-notification-healthcheck"
+  function_name = "slack-notification-healthcheck-${var.topic_name}"
   role          = aws_iam_role.default[0].arn
   handler       = "main"