diff --git a/include/TrackFinder.hpp b/include/TrackFinder.hpp
index 05e0741..165a6eb 100644
--- a/include/TrackFinder.hpp
+++ b/include/TrackFinder.hpp
@@ -13,6 +13,7 @@
 #include <vector>
 #include <string>
 #include <sstream>
+#include <algorithm>
 
 struct Hit
 {