diff --git a/components/schemas/environments/services/discovery/DiscoveryConfig.yml b/components/schemas/environments/services/discovery/DiscoveryConfig.yml
index c4d01b68..45111454 100644
--- a/components/schemas/environments/services/discovery/DiscoveryConfig.yml
+++ b/components/schemas/environments/services/discovery/DiscoveryConfig.yml
@@ -50,3 +50,7 @@ properties:
             type: string
             enum: [default, ipv4, ipv6]
       - type: "null"
+  domain_suffix:
+    anyOf:
+      - type: string
+      - type: "null"
diff --git a/stackspec/schema/services/discovery/StackSpecDiscoveryConfig.yml b/stackspec/schema/services/discovery/StackSpecDiscoveryConfig.yml
index d4a2292e..1a21e887 100644
--- a/stackspec/schema/services/discovery/StackSpecDiscoveryConfig.yml
+++ b/stackspec/schema/services/discovery/StackSpecDiscoveryConfig.yml
@@ -57,3 +57,8 @@ properties:
             enum: [default, ipv4, ipv6]
       - $ref: ../../StackVariable.yml
       - type: "null"
+  domain_suffix:
+    anyOf:
+      - type: string
+      - $ref: ../../StackVariable.yml
+      - type: "null"