diff --git a/nixos/modules/services/databases/postgresql.md b/nixos/modules/services/databases/postgresql.md
index 4de0ca9d2e90..77c87e3f063b 100644
--- a/nixos/modules/services/databases/postgresql.md
+++ b/nixos/modules/services/databases/postgresql.md
@@ -363,6 +363,6 @@ postgresql.withJIT.pname
 
 evaluates to `"foobar"`.
 
-## Notable differences to upstream
+## Notable differences to upstream {#module-services-postgres-upstream-deviation}
 
 - To avoid circular dependencies between default and -dev outputs, the output of the `pg_config` system view has been removed.