diff --git a/others/lru_cache.cpp b/others/lru_cache.cpp
index d0c30afb5..80993f7e4 100644
--- a/others/lru_cache.cpp
+++ b/others/lru_cache.cpp
@@ -251,7 +251,7 @@ int main() {
     lru_tests::run_tests();
 
     // Usage
-    lru_cache::LRUCache cache(4);
+    others::lru_cache::LRUCache cache(4);
     cache.refer(1);
     cache.refer(2);
     cache.refer(3);