diff --git a/src/obj-magic.cpp b/src/obj-magic.cpp
index 21c9a23..174c9ac 100644
--- a/src/obj-magic.cpp
+++ b/src/obj-magic.cpp
@@ -1,3 +1,4 @@
+#include <algorithm>
 #include <string>
 #include <iostream>
 #include <iomanip>