diff --git a/data_structures/dsu_union_rank.cpp b/data_structures/dsu_union_rank.cpp
index 006a99646..da2a842c2 100644
--- a/data_structures/dsu_union_rank.cpp
+++ b/data_structures/dsu_union_rank.cpp
@@ -17,9 +17,9 @@
  * @see dsu_path_compression.cpp
  */
 
-#include <iostream> /// for IO operations
-#include <vector>  /// for std::vector
-#include <cassert>   /// for assert
+#include <iostream>   /// for IO operations
+#include <vector>    /// for std::vector
+#include <cassert>  /// for assert
 
 
 using std::cout;