diff --git a/bindings/python/src/tokenizer.rs b/bindings/python/src/tokenizer.rs
index a4ec7b26f..45dfa09e7 100644
--- a/bindings/python/src/tokenizer.rs
+++ b/bindings/python/src/tokenizer.rs
@@ -1036,7 +1036,7 @@ impl PyTokenizer {
         is_pretokenized: bool,
         add_special_tokens: bool,
     ) -> PyResult<Vec<PyEncoding>> {
-        let mut items = Vec::<tk::EncodeInput>::new();
+        let mut items = Vec::<tk::EncodeInput>::with_capacity(input.len());
         for i in 0..input.len()? {
             let item = input.get_item(i)?;
             let item: tk::EncodeInput = if is_pretokenized {