diff --git a/main.tf b/main.tf
index 32c4433..7b43530 100644
--- a/main.tf
+++ b/main.tf
@@ -23,10 +23,10 @@ resource "scaleway_instance_server" "this" {
   enable_ipv6       = var.routed_ip_enabled ? null : var.enable_ipv6
   routed_ip_enabled = var.routed_ip_enabled
 
-  ip_ids = tolist([
+  ip_ids = compact(tolist([
     var.enable_public_ipv4 ? scaleway_instance_ip.public_ipv4[0].id : null,
     var.enable_ipv6 && var.routed_ip_enabled ? scaleway_instance_ip.ipv6[0].id : null,
-  ])
+  ]))
 
   dynamic "private_network" {
     for_each = toset(var.private_networks)