diff --git a/sys/arm64/include/param.h b/sys/arm64/include/param.h
--- a/sys/arm64/include/param.h
+++ b/sys/arm64/include/param.h
@@ -108,15 +108,6 @@
 #define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
 #define	PCPU_PAGES		1
 
-/*
- * Ceiling on size of buffer cache (really only effects write queueing,
- * the VM page cache is not effected), can be changed via
- * the kern.maxbcache /boot/loader.conf variable.
- */
-#ifndef VM_BCACHE_SIZE_MAX
-#define	VM_BCACHE_SIZE_MAX      (400 * 1024 * 1024)
-#endif
-
 /*
  * Mach derived conversion macros
  */