diff --git a/math/power_of_two.cpp b/math/power_of_two.cpp
index 49b149fb4..49733d34f 100644
--- a/math/power_of_two.cpp
+++ b/math/power_of_two.cpp
@@ -19,7 +19,7 @@
  * @author [Neha Hasija](https://github.com/neha-hasija17)
  */
  
-#include <iostream>
+#include <iostream>  /// for std::cout
 /**
  * @brief Function to test above algorithm
  * @param n description