diff --git a/shared/helpers.h b/shared/helpers.h
index 1d1e458..ac9ea8b 100644
--- a/shared/helpers.h
+++ b/shared/helpers.h
@@ -53,6 +53,17 @@
 #endif
 
 /**
+ * Returns the bigger of two values.
+ *
+ * @param x the first item to compare.
+ * @param y the second item to compare.
+ * @return the value that evaluates to more than the other.
+ */
+#ifndef MAX
+#define MAX(x,y) (((x) > (y)) ? (x) : (y))
+#endif
+
+/**
  * Returns a pointer the the containing struct of a given member item.
  *
  * To demonstrate, the following example retrieves a pointer to