diff --git a/aegisub/src/visual_tool_vector_clip.cpp b/aegisub/src/visual_tool_vector_clip.cpp
index 061a9d825..cd667c999 100644
--- a/aegisub/src/visual_tool_vector_clip.cpp
+++ b/aegisub/src/visual_tool_vector_clip.cpp
@@ -46,6 +46,7 @@
 #include "gl/glext.h"
 #endif
 
+#include <algorithm>
 #endif
 
 #include "config.h"