diff --git a/lib/concentrate/parser/gtfs_realtime_enhanced.ex b/lib/concentrate/parser/gtfs_realtime_enhanced.ex
index 6fb21e25..b6b7efd4 100644
--- a/lib/concentrate/parser/gtfs_realtime_enhanced.ex
+++ b/lib/concentrate/parser/gtfs_realtime_enhanced.ex
@@ -300,7 +300,7 @@ defmodule Concentrate.Parser.GTFSRealtimeEnhanced do
 
   defp calculate_uncertainty("mid_trip"), do: 60
   defp calculate_uncertainty("at_terminal"), do: 120
-  defp calculate_uncertainty("reverse_prediction"), do: 360
+  defp calculate_uncertainty("reverse_trip"), do: 360
 
   defp schedule_relationship(nil), do: :SCHEDULED
 
diff --git a/test/concentrate/parser/gtfs_realtime_enhanced_test.exs b/test/concentrate/parser/gtfs_realtime_enhanced_test.exs
index b07a3b55..882d494e 100644
--- a/test/concentrate/parser/gtfs_realtime_enhanced_test.exs
+++ b/test/concentrate/parser/gtfs_realtime_enhanced_test.exs
@@ -428,13 +428,13 @@ defmodule Concentrate.Parser.GTFSRealtimeEnhancedTest do
       assert stu.uncertainty == 120
     end
 
-    test "decodes reverse_prediction update_type to determine uncertainty value" do
+    test "decodes reverse_trip update_type to determine uncertainty value" do
       update = %{
         "trip" => %{
           "trip_id" => "trip",
           "route_id" => "route"
         },
-        "update_type" => "reverse_prediction",
+        "update_type" => "reverse_trip",
         "stop_time_update" => [
           %{
             "arrival" => %{"time" => 100, "uncertainty" => 500},