diff --git a/prdoc/pr_9186.prdoc b/prdoc/pr_9186.prdoc
new file mode 100644
index 0000000000000..80ddae3e6491a
--- /dev/null
+++ b/prdoc/pr_9186.prdoc
@@ -0,0 +1,9 @@
+title: 'pallet-staking-async: Use saturating addition for era reward points'
+doc:
+- audience: Runtime Dev
+  description: |-
+    This PR replaces regular addition with saturating addition when accumulating era reward points in
+    pallet-staking-async to prevent potential overflow.
+crates:
+- name: pallet-staking-async
+  bump: patch
\ No newline at end of file
diff --git a/substrate/frame/staking-async/src/session_rotation.rs b/substrate/frame/staking-async/src/session_rotation.rs
index de7a47a8675fd..21e38f26ffc69 100644
--- a/substrate/frame/staking-async/src/session_rotation.rs
+++ b/substrate/frame/staking-async/src/session_rotation.rs
@@ -364,7 +364,7 @@ impl<T: Config> Eras<T> {
 								era_rewards.individual.try_insert(validator, points).defensive();
 						},
 					}
-					era_rewards.total += points;
+					era_rewards.total.saturating_accrue(points);
 				}
 			});
 		}