diff --git a/staker/manage_pool_tier_and_warmup.gno b/staker/manage_pool_tier_and_warmup.gno
index 9dbdf5314..efe71faed 100644
--- a/staker/manage_pool_tier_and_warmup.gno
+++ b/staker/manage_pool_tier_and_warmup.gno
@@ -147,6 +147,8 @@ func pctToIndex(pct int64) int {
 		return 2
 	case 100:
 		return 3
+	default:
+		panic(ufmt.Sprintf("invalid pct(%d)", pct))
 	}
 }