diff --git a/src/utils/tokenize.rs b/src/utils/tokenize.rs
index 6e7f445..6efec1e 100644
--- a/src/utils/tokenize.rs
+++ b/src/utils/tokenize.rs
@@ -28,6 +28,7 @@ pub struct GreedyTokenizer<
     suffix_data: Vec<SuffixInTrieData<TokenIDType>>,
 }
 
+#[derive(Clone, Debug)]
 pub struct OwnedGeneralSAM<TransTable: TransitionTable> {
     pub sam: GeneralSAM<TransTable>,
 }