diff --git a/include/utils/lock_table.h b/include/utils/lock_table.h
index b59e5da..8f1d0e3 100644
--- a/include/utils/lock_table.h
+++ b/include/utils/lock_table.h
@@ -131,6 +131,10 @@ namespace pipeann {
       }
     }
     ~LockTable() {
+      for (size_t i = 0; i < size_; i++) {
+        pthread_rwlock_destroy(&locks_[i]);
+      }
+      delete[] locks_;
     }
 
     inline pthread_rwlock_t *rdlock(uint32_t key) {
@@ -262,4 +266,4 @@ namespace pipeann {
 
 }  // namespace pipeann
 
-#endif  // LOCK_TABLE_H_
\ No newline at end of file
+#endif  // LOCK_TABLE_H_