--- Libc/Libc-391.2.3/include/malloc/malloc.h
+++ Libc/Libc-498/include/malloc/malloc.h
@@ -87,6 +87,9 @@
 
 extern size_t malloc_size(const void *ptr);
     /* Returns size of given ptr */
+
+extern size_t malloc_good_size(size_t size);
+    /* Returns number of bytes greater than or equal to size that can be allocated without padding */
 
 /*********	Batch methods	************/