diff --git a/AWS/RDS/DBInstance.hs b/AWS/RDS/DBInstance.hs
--- a/AWS/RDS/DBInstance.hs
+++ b/AWS/RDS/DBInstance.hs
@@ -127,8 +127,7 @@
             toText <$> createDBInstanceBackupRetentionPeriod
         , "CharacterSetName" |=?
             createDBInstanceCharacterSetName
-        , "DBInstanceClass" |=
-            toText createDBInstanceClass
+        , "DBInstanceClass" |= createDBInstanceClass
         , "DBInstanceIdentifier" |=
             createDBInstanceIdentifier
         , "DBName" |=? createDBInstanceDBName
@@ -138,7 +137,7 @@
             createDBInstanceDBSecurityGroups
         , "DBSubnetGroupName" |=?
             createDBInstanceDBSubnetGroupName
-        , "Engine" |= toText createDBInstanceEngine
+        , "Engine" |= createDBInstanceEngine
         , "EngineVersion" |=? createDBInstanceEngineVersion
         , "Iops" |=? toText <$> createDBInstanceIops
         , "LicenseModel" |=?
diff --git a/aws-sdk.cabal b/aws-sdk.cabal
--- a/aws-sdk.cabal
+++ b/aws-sdk.cabal
@@ -1,5 +1,5 @@
 name:                aws-sdk
-version:             0.11.2
+version:             0.11.3
 synopsis:            AWS SDK for Haskell
 description: AWS (Amazon Web Services) sdk for Haskell.
              .