diff --git a/operations/template/net.tf b/operations/template/net.tf
index f0af5ea84..b8b2aa949 100644
--- a/operations/template/net.tf
+++ b/operations/template/net.tf
@@ -191,7 +191,7 @@ resource "azurerm_network_security_rule" "db_inbound_allow" {
   protocol                    = "Tcp"
   source_port_range           = "*"
   destination_port_ranges     = ["5432"]
-  source_address_prefix       = *
+  source_address_prefix       = "*"
   destination_address_prefix  = "VirtualNetwork"
   resource_group_name         = data.azurerm_resource_group.group.name
   network_security_group_name = azurerm_network_security_group.db_security_group.name