diff --git a/project.config b/project.config
index 7a08d23..135575a 100644
--- a/project.config
+++ b/project.config
@@ -102,3 +102,8 @@
 	applicableIf = -path:\"^.*$\"
 	submittableIf = is:false
 	canOverrideInChildProjects = false
+[submit-requirement "Topics-Not-Supported"]
+	description = A topic is set on this change but topics are not supported on this host.
+	applicableIf = -topic:\"\"
+	submittableIf = is:false
+	canOverrideInChildProjects = false