diff --git a/src/utils/lru_cache.hpp b/src/utils/lru_cache.hpp
index ea11775..621bc21 100644
--- a/src/utils/lru_cache.hpp
+++ b/src/utils/lru_cache.hpp
@@ -26,9 +26,9 @@ namespace detail {
             VERIFY(!max_size || max_size.unwrap() > 0);
         }
 
-        void set_max_size(optional<std::size_t> max_size) {
-            VERIFY(!max_size || max_size.unwrap() > 0);
-            this->max_size = max_size;
+        void set_max_size(optional<std::size_t> size) {
+            VERIFY(!size || size.unwrap() > 0);
+            max_size = size;
             maybe_trim();
         }