diff --git a/src/Nest/Aggregations/Pipeline/GapPolicy.cs b/src/Nest/Aggregations/Pipeline/GapPolicy.cs
index f41818a3f52..dd63ec7b67b 100644
--- a/src/Nest/Aggregations/Pipeline/GapPolicy.cs
+++ b/src/Nest/Aggregations/Pipeline/GapPolicy.cs
@@ -14,6 +14,9 @@ public enum GapPolicy
 		Skip,
 
 		[EnumMember(Value = "insert_zeros")]
-		InsertZeros
+		InsertZeros,
+
+		[EnumMember(Value = "keep_values")]
+		KeepValues
 	}
 }