diff --git a/compiler/cpp/src/generate/t_hs_generator.cc b/compiler/cpp/src/generate/t_hs_generator.cc
index 7fce44d..c71a174 100644
--- a/compiler/cpp/src/generate/t_hs_generator.cc
+++ b/compiler/cpp/src/generate/t_hs_generator.cc
@@ -228,7 +228,7 @@
     result += "\n";
   }
 
-  result += "import Thrift\nimport Data.Typeable ( Typeable )\nimport Control.Exception\nimport qualified Data.Map as Map\nimport qualified Data.Set as Set\nimport Data.Int;\nimport Prelude ((==), String, Eq, Show, Ord, Maybe(..), (&&), (||), return, IO, Enum, fromEnum, toEnum, Bool(..), (++))";
+  result += "import Thrift\nimport Data.Typeable ( Typeable )\nimport Control.Exception\nimport qualified Data.Map as Map\nimport qualified Data.Set as Set\nimport Data.Int;\nimport Prelude ((==), String, Eq, Show, Ord, Maybe(..), (&&), (||), return, IO, Enum, fromEnum, toEnum, Bool(..), (++), ($), Double, (-))";
   return result;
 }