diff --git a/app/models/time_series/trend.rb b/app/models/time_series/trend.rb
index 70f9077e..c8e50a57 100644
--- a/app/models/time_series/trend.rb
+++ b/app/models/time_series/trend.rb
@@ -48,7 +48,7 @@ class TimeSeries::Trend
 
   def as_json
     {
-      favorable_direction: favorable_direction,
+      favorableDirection: favorable_direction,
       direction: direction,
       value: value,
       percent: percent