diff --git a/docs/notebooks/batch_trust_region.pct.py b/docs/notebooks/batch_trust_region.pct.py
index 3d6b23514f..78f4f3c050 100644
--- a/docs/notebooks/batch_trust_region.pct.py
+++ b/docs/notebooks/batch_trust_region.pct.py
@@ -66,7 +66,7 @@
 num_query_points = 5
 
 init_subspaces = [
-    trieste.acquisition.rule.SingleObjectiveTRBox(search_space)
+    trieste.acquisition.rule.SingleObjectiveTrustRegionBox(search_space)
     for _ in range(num_query_points)
 ]
 base_rule = trieste.acquisition.rule.EfficientGlobalOptimization(  # type: ignore[var-annotated]