diff --git a/util/superiotool/superiotool.c b/util/superiotool/superiotool.c
index ed18c13e62..576e9e6702 100644
--- a/util/superiotool/superiotool.c
+++ b/util/superiotool/superiotool.c
@@ -323,9 +323,12 @@ int main(int argc, char *argv[])
 #if defined(__FreeBSD__)
 	if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
 		perror("/dev/io");
-#else
+#elif defined(__NetBSD__)
 	if (iopl(3) < 0) {
 		perror("iopl");
+#else
+	if (ioperm(0, 6000, 1) < 0) {
+		perror("ioperm");
 #endif
 		printf("Superiotool must be run as root.\n");
 		exit(1);
diff --git a/util/superiotool/superiotool.h b/util/superiotool/superiotool.h
index a621ae5274..8c01559759 100644
--- a/util/superiotool/superiotool.h
+++ b/util/superiotool/superiotool.h
@@ -8,7 +8,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <getopt.h>
-#if defined(__GLIBC__)
+#if defined(__linux__)
 #include <sys/io.h>
 #endif
 #if (defined(__MACH__) && defined(__APPLE__))
@@ -24,6 +24,9 @@
 # endif
 #endif
 
+#include <sys/types.h>
+#include <stdint.h>
+
 #if defined(__FreeBSD__)
 #include <sys/types.h>
 #include <machine/cpufunc.h>