diff --git a/docs/project/olmv1_limitations.md b/docs/project/olmv1_limitations.md
index 8f0e921e34..c27200b6dd 100644
--- a/docs/project/olmv1_limitations.md
+++ b/docs/project/olmv1_limitations.md
@@ -14,6 +14,7 @@ Currently, OLM v1 only supports installing operators packaged in [OLM v0 bundles
     * `olm.gvk.required`
     * `olm.package.required`
     * `olm.constraint`
+* **must not** define `APIService`s in the `ClusterServiceVersion`
 
 OLM v1 verifies these criteria at install time and will surface violations in the `ClusterExtensions`'s `.status.conditions`.