diff --git a/modules/net-lb-app-int/main.tf b/modules/net-lb-app-int/main.tf
index d056e8be7..3b63cfc41 100644
--- a/modules/net-lb-app-int/main.tf
+++ b/modules/net-lb-app-int/main.tf
@@ -108,12 +108,16 @@ resource "google_compute_region_target_http_proxy" "default" {
 }
 
 resource "google_compute_region_target_https_proxy" "default" {
-  count                            = var.protocol == "HTTPS" ? 1 : 0
-  project                          = var.project_id
-  region                           = var.region
-  name                             = var.name
-  description                      = var.description
-  ssl_certificates                 = local.proxy_ssl_certificates
+  count       = var.protocol == "HTTPS" ? 1 : 0
+  project     = var.project_id
+  region      = var.region
+  name        = var.name
+  description = var.description
+  ssl_certificates = (
+    length(local.proxy_ssl_certificates) == 0
+    ? null
+    : local.proxy_ssl_certificates
+  )
   ssl_policy                       = var.https_proxy_config.ssl_policy
   url_map                          = google_compute_region_url_map.default.id
   certificate_manager_certificates = var.https_proxy_config.certificate_manager_certificates