diff --git a/manifests/prometheus-operator/prometheus-operator-cluster-role.yaml b/manifests/prometheus-operator/prometheus-operator-cluster-role.yaml
index 809c9a70cc8f862dfe09f0badd424f555fd684e6..1b13c89951c4a0c88ac94d88a97840f9adb558a5 100644
--- a/manifests/prometheus-operator/prometheus-operator-cluster-role.yaml
+++ b/manifests/prometheus-operator/prometheus-operator-cluster-role.yaml
@@ -21,6 +21,7 @@ rules:
   - alertmanagers
   - prometheuses
   - prometheuses/finalizers
+  - alertmanagers/finalizers
   - servicemonitors
   verbs:
   - "*"