diff --git a/README.md b/README.md
index 2eb0c1b..efdb9ee 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,8 @@ For example, if we wanted to figure out how user age influences their score:
 ```haskell
 data ScoreByAge = ScoreByAge { t :: Double, m :: Double }
   deriving (Eq, Generic, Show)
+
+instance Opium.FromRow ScoreByAge where
   
 getScoreByAge :: Connection -> IO ScoreByAge
 getScoreByAge conn = do