diff --git a/src/utils/Image_Utils.h b/src/utils/Image_Utils.h
index e6890d2..2b8f40a 100644
--- a/src/utils/Image_Utils.h
+++ b/src/utils/Image_Utils.h
@@ -10,6 +10,8 @@
 #ifndef __IMAGE_UTILS_H__
 #define __IMAGE_UTILS_H__
 
+#include <algorithm>
+
 enum ImageOcclusion
 {
     IMAGE_OPAQUE,