diff --git a/others/lru_cache.cpp b/others/lru_cache.cpp
index 1b6589b66..d03c9b206 100644
--- a/others/lru_cache.cpp
+++ b/others/lru_cache.cpp
@@ -50,6 +50,11 @@
 #include <list>           /// for std::list
 #include <unordered_map>  /// for std::unordered_map
 
+/**
+ * @namespace others
+ * @brief Other algorithms
+ */
+namespace others {
 /**
  * @namespace lru_cache
  * @brief Implementation of LRU caching algorithm