diff --git a/src/aggregation/bucket/histogram/date_histogram.rs b/src/aggregation/bucket/histogram/date_histogram.rs
index a46d71dc4..dd85cc51e 100644
--- a/src/aggregation/bucket/histogram/date_histogram.rs
+++ b/src/aggregation/bucket/histogram/date_histogram.rs
@@ -34,10 +34,10 @@ use crate::aggregation::*;
 pub struct DateHistogramAggregationReq {
     #[doc(hidden)]
     /// Only for validation
-    interval: Option<String>,
+    pub interval: Option<String>,
     #[doc(hidden)]
     /// Only for validation
-    calendar_interval: Option<String>,
+    pub calendar_interval: Option<String>,
     /// The field to aggregate on.
     pub field: String,
     /// The format to format dates. Unsupported currently.