diff --git a/infrastructure/terraform/shared/main.tf b/infrastructure/terraform/shared/main.tf
index 5e189dc9..83845185 100644
--- a/infrastructure/terraform/shared/main.tf
+++ b/infrastructure/terraform/shared/main.tf
@@ -366,7 +366,7 @@ module "postcode_splitter_s3_read" {
   policy_name        = "PostcodeSplitterReadS3"
   policy_description = "Allow postcode splitter Lambda to read from retrofit-data bucket"
   bucket_arns        = ["arn:aws:s3:::retrofit-data-${var.stage}"]
-  actions            = ["s3:GetObject"]
+  actions            = ["s3:GetObject", "s3:ListBucket"]
   resource_paths     = ["/*"]
 }