diff --git a/sys/sys/user.h b/sys/sys/user.h
index de49e9278ef5..ee21f27b9e09 100644
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -74,7 +74,7 @@
  * to initialize it in two places: kern/kern_proc.c in the function
  * fill_kinfo_proc and in lib/libkvm/kvm_proc.c in the function kvm_proclist.
  */
-#ifdef	__alpha__
+#if defined(__alpha__) || defined(__sparc64__)
 #define	KINFO_PROC_SIZE	912		/* the correct size for kinfo_proc */
 #endif
 #ifdef	__ia64__
@@ -86,9 +86,6 @@
 #ifdef  __powerpc__
 #define	KINFO_PROC_SIZE	656
 #endif
-#ifdef	__sparc64__
-#define	KINFO_PROC_SIZE 888
-#endif
 #ifndef	KINFO_PROC_SIZE
 #error	"Unknown architecture"
 #endif