diff --git a/aegisub/libaegisub/include/libaegisub/util.h b/aegisub/libaegisub/include/libaegisub/util.h
index 975825a09..ff0419f6c 100644
--- a/aegisub/libaegisub/include/libaegisub/util.h
+++ b/aegisub/libaegisub/include/libaegisub/util.h
@@ -22,6 +22,8 @@
 #include <string>
 #include <stdio.h>
 #include <time.h>
+
+#include <algorithm>
 #endif // LAGI_PRE
 
 #include <libaegisub/access.h>