diff --git a/proto/substrait/algebra.proto b/proto/substrait/algebra.proto
index 847114d49..89fb189f7 100644
--- a/proto/substrait/algebra.proto
+++ b/proto/substrait/algebra.proto
@@ -267,7 +267,7 @@ message AggregateRel {
 
     // A list of zero or more references to grouping expressions, i.e., indices
     // into the `grouping_expression` list.
-    repeated uint32 expression_reference = 2;
+    repeated uint32 expression_references = 2;
   }
 
   message Measure {