diff --git a/contracts/dex-lock/src/helper.rs b/contracts/dex-lock/src/helper.rs
index 2f615e8..ecf5292 100644
--- a/contracts/dex-lock/src/helper.rs
+++ b/contracts/dex-lock/src/helper.rs
@@ -15,7 +15,7 @@ const MIN_ARGS_SIZE: usize = 66;
 pub struct DexArgs {
     // the minimum length of serialized lock script is 49bytes
     pub owner_lock:  Script,
-    // 0b_xxxx_x0xx is for UDT asset and 0b_xxxx_x1xx is for NFT
+    // 0b_xxxx_x0xx is for FT asset and 0b_xxxx_x1xx is for NFT asset
     pub setup:       u8,
     pub total_value: u128,
 }
@@ -35,7 +35,7 @@ impl DexArgs {
         let owner_lock = Script::from_slice(&data[..owner_size]).map_err(|_e| Error::Encoding)?;
         let setup = data[owner_size];
         // If the third bit of setup is 0, it means FT(0b_xxxx_x0xx), otherwise it means
-        // NFT(0b_xxxx_x1xx)
+        // NFT(0b_xxxx_x1xx). The remaining bits are temporarily reserved or not implemented
         if setup != 0 && setup != 4 {
             return Err(Error::DexSetupInvalid);
         }