diff -Naur libgtop-2.40.0.org/sysdeps/bsd/prockernel.c libgtop-2.40.0.sw/sysdeps/bsd/prockernel.c
--- libgtop-2.40.0.org/sysdeps/bsd/prockernel.c	2022-03-02 01:48:18.960000000 +0000
+++ libgtop-2.40.0.sw/sysdeps/bsd/prockernel.c	2022-03-02 01:54:03.870000000 +0000
@@ -33,7 +33,7 @@
 #if (!defined __OpenBSD__) && (!defined __bsdi__)
 #include <sys/user.h>
 #endif
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && defined(__alpha__)) && \
+#if !defined(__bsdi__) && !(defined(__FreeBSD__) && (defined(__alpha__) || defined(__sw_64__))) && \
     !defined(__NetBSD__) 
 #include <machine/pcb.h>
 #endif
@@ -204,7 +204,7 @@
 		       (char *) &pcb, sizeof (pcb)) == sizeof (pcb))
 		{
 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-#ifndef __alpha__
+#if !defined __alpha__ && !defined __sw_64__
 #if (__FreeBSD_version >= 300003) || defined(__FreeBSD_kernel__)
 			buf->kstk_esp = (guint64) pcb.pcb_esp;
 			buf->kstk_eip = (guint64) pcb.pcb_eip;
@@ -240,7 +240,7 @@
 #elif defined(__sparc__)
 			buf->kstk_esp = (guint64) pcb.pcb_sp;
 			buf->kstk_eip = (guint64) pcb.pcb_pc;
-#elif defined(__alpha__)
+#elif defined(__alpha__) || defined(__sw_64__)
 			buf->kstk_esp = (guint64) pcb.pcb_context[9];
 			buf->kstk_eip = (guint64) pcb.pcb_context[8];
 #else