diff --git a/modules/net-lb-app-ext-regional/urlmap.tf b/modules/net-lb-app-ext-regional/urlmap.tf
index 2cc7abdede..e305918d08 100644
--- a/modules/net-lb-app-ext-regional/urlmap.tf
+++ b/modules/net-lb-app-ext-regional/urlmap.tf
@@ -432,7 +432,7 @@ resource "google_compute_region_url_map" "default" {
         }
       }
       dynamic "route_rules" {
-        for_each = toset(coalesce(m.value.route_rules, []))
+        for_each = coalesce(m.value.route_rules, [])
         content {
           priority = route_rules.value.priority
           service = route_rules.value.service == null ? null : lookup(
diff --git a/modules/net-lb-app-int-cross-region/urlmap.tf b/modules/net-lb-app-int-cross-region/urlmap.tf
index 93c4e14d5f..753fcc6131 100644
--- a/modules/net-lb-app-int-cross-region/urlmap.tf
+++ b/modules/net-lb-app-int-cross-region/urlmap.tf
@@ -271,7 +271,7 @@ resource "google_compute_url_map" "default" {
         }
       }
       dynamic "route_rules" {
-        for_each = toset(coalesce(m.value.route_rules, []))
+        for_each = coalesce(m.value.route_rules, [])
         content {
           priority = route_rules.value.priority
           service = route_rules.value.service == null ? null : lookup(
diff --git a/modules/net-lb-app-int/urlmap.tf b/modules/net-lb-app-int/urlmap.tf
index 21f7e59723..3fd01270be 100644
--- a/modules/net-lb-app-int/urlmap.tf
+++ b/modules/net-lb-app-int/urlmap.tf
@@ -272,7 +272,7 @@ resource "google_compute_region_url_map" "default" {
         }
       }
       dynamic "route_rules" {
-        for_each = toset(coalesce(m.value.route_rules, []))
+        for_each = coalesce(m.value.route_rules, [])
         content {
           priority = route_rules.value.priority
           service = route_rules.value.service == null ? null : lookup(