--- libmalloc/libmalloc-166.220.1/src/magazine_rack.h
+++ libmalloc/libmalloc-283/src/magazine_rack.h
@@ -48,6 +48,7 @@
 	RACK_TYPE_NONE = 0,
 	RACK_TYPE_TINY,
 	RACK_TYPE_SMALL,
+	RACK_TYPE_MEDIUM,
 );
 
 /*******************************************************************************