diff --git a/src/main/java/com/conveyal/gtfs/graphql/GraphQLGtfsSchema.java b/src/main/java/com/conveyal/gtfs/graphql/GraphQLGtfsSchema.java
index <HASH>..<HASH> 100644
--- a/src/main/java/com/conveyal/gtfs/graphql/GraphQLGtfsSchema.java
+++ b/src/main/java/com/conveyal/gtfs/graphql/GraphQLGtfsSchema.java
@@ -119,6 +119,7 @@ public class GraphQLGtfsSchema {
     public static final GraphQLObjectType fareType = newObject().name("fare_attributes")
             .description("A GTFS agency object")
             .field(MapFetcher.field("id", GraphQLInt))
+            .field(MapFetcher.field("agency_id"))
             .field(MapFetcher.field("fare_id"))
             .field(MapFetcher.field("price", GraphQLFloat))
             .field(MapFetcher.field("currency_type"))
fix(graphql): add missing Fare#agency_id field to GraphQL spec

refs catalogueglobal/datatools-ui#<I>