diff --git a/src/Data/HexString.hs b/src/Data/HexString.hs
index d66ae6c..f8d8d24 100644
--- a/src/Data/HexString.hs
+++ b/src/Data/HexString.hs
@@ -38,7 +38,7 @@ import qualified Generics.SOP as SOP
 --   are valid hex characters.
 data HexString =
   HexString BS.ByteString
-  deriving stock (Prelude.Show, GHC.Generic)
+  deriving stock (Eq, Prelude.Show, GHC.Generic)
   deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
   deriving anyclass (Data.Structured.Show)
   deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct HexString