--- libfreeipmi/src/driver/ipmi-kcs-driver.c    2011-04-21 16:02:41.000000000 -0500
+++ libfreeipmi/src/driver/ipmi-kcs-driver.c.netbsd     2011-08-13 22:08:46.000000000 -0500
@@ -158,7 +158,21 @@
 # include <asm/io.h>
 #endif
 
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
+/* Code for asm_inb() and asm_outb() taken from:
+       http://cvsweb.se.netbsd.org/cgi-bin/bsdweb.cgi/pkgsrc/sysutils/vbetool/patches/patch-ab?rev=1.4;content-type=text/plain
+*/
+#if defined(__NetBSD__)
+static uint8_t asm_inb(unsigned port) {
+       uint8_t data;
+       __asm volatile("inb %w1,%0" : "=a" (data) : "d" (port));
+       return data;
+}
+static __inline void asm_outb(uint8_t data, unsigned port) {
+       __asm volatile("outb %0,%w1" : : "a" (data), "d" (port));
+}
+# define _INB(port)  asm_inb (port)
+# define _OUTB(data, port)  asm_outb (data, port)
+#elif defined(__FreeBSD__) || defined(__OpenBSD__)
 # define _INB(port)  inb (port)
 # define _OUTB(data, port)  outb (port, data)
 #elif defined(HAVE_IOPL)