diff --git a/quickstart/201-function-app/main.tf b/quickstart/201-function-app/main.tf
index 5c09c6369..99877d728 100644
--- a/quickstart/201-function-app/main.tf
+++ b/quickstart/201-function-app/main.tf
@@ -4,7 +4,7 @@ resource "azurerm_resource_group" "default" {
 }
 
 resource "azurerm_storage_account" "default" {
-  name                     = "${replace(random_pet.prefix.id, "-", "")}sa"
+  name                     = "${substr(replace(random_pet.prefix.id, "-", ""), 0, 22)}sa"
   resource_group_name      = azurerm_resource_group.default.name
   location                 = azurerm_resource_group.default.location
   account_tier             = "Standard"