diff --git a/lib/Ghost.cpp b/lib/Ghost.cpp
index 33acd00..31c2de4 100644
--- a/lib/Ghost.cpp
+++ b/lib/Ghost.cpp
@@ -2,6 +2,7 @@
 #include <array>
 #include <cmath>
 #include <numeric>
+#include <algorithm>
 
 namespace pacman {