diff --git a/src/model.rs b/src/model.rs
index 41dec87..0efd0a6 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -42,7 +42,7 @@ impl VoskModel {
     }
 
     #[inline]
-    pub fn get_final_result(&self, sess: &mut VoskSession) -> crate::TranscriptionResult {
+    pub fn get_final_result(&self, sess: VoskSession) -> crate::TranscriptionResult {
         let cstr = unsafe { CStr::from_ptr(ffi::vosk_recognizer_final_result(sess.inner)) };
 
         serde_json::from_str(cstr.to_str().unwrap()).unwrap()
diff --git a/src/session.rs b/src/session.rs
index 5ba0857..81cf3d1 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -101,3 +101,9 @@ impl VoskSession {
         }
     }
 }
+
+impl Drop for VoskSession {
+    fn drop(&mut self) {
+        unsafe { ffi::vosk_recognizer_free(self.inner) }
+    }
+}