diff --git a/arc4random.c b/arc4random.c
index a039711f..5e044643 100644
--- a/arc4random.c
+++ b/arc4random.c
@@ -201,16 +201,16 @@ arc4_seed_sysctl_linux(void)
 }
 #endif
 
-#if _EVENT_HAVE_DECL_CTL_KERN && _EVENT_HAVE_DECL_KERN_ARAND
+#if _EVENT_HAVE_DECL_CTL_KERN && _EVENT_HAVE_DECL_KERN_ARND
 #define TRY_SEED_SYSCTL_BSD
 static int
 arc4_seed_sysctl_bsd(void)
 {
 	/* Based on code from William Ahern and from OpenBSD, this function
-	 * tries to use the KERN_ARAND syscall to get entropy from the kernel.
+	 * tries to use the KERN_ARND syscall to get entropy from the kernel.
 	 * This can work even if /dev/urandom is inaccessible for some reason
 	 * (e.g., we're running in a chroot). */
-	int mib[] = { CTL_KERN, KERN_ARAND };
+	int mib[] = { CTL_KERN, KERN_ARND };
 	unsigned char buf[ADD_ENTROPY];
 	size_t len, n;
 	int i, any_set;
@@ -218,7 +218,7 @@ arc4_seed_sysctl_bsd(void)
 	memset(buf, 0, sizeof(buf));
 
 	len = sizeof(buf);
-	if (sysctl(mib, 2, rnd, &len, NULL, 0) == -1) {
+	if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
 		for (len = 0; len < sizeof(buf); len += sizeof(unsigned)) {
 			n = sizeof(unsigned);
 			if (n + len > sizeof(buf))
diff --git a/configure.in b/configure.in
index 171801fe..e2177eff 100644
--- a/configure.in
+++ b/configure.in
@@ -46,7 +46,7 @@ AC_ARG_ENABLE(debug-mode,
 AC_PROG_LIBTOOL
 
 dnl   Uncomment "AC_DISABLE_SHARED" to make shared librraries not get
-dnl   built by default.  You can also turn shared libs on and off from 
+dnl   built by default.  You can also turn shared libs on and off from
 dnl   the command line with --enable-shared and --disable-shared.
 dnl AC_DISABLE_SHARED
 AC_SUBST(LIBTOOL_DEPS)
@@ -159,8 +159,9 @@ if test "x$ac_cv_header_sys_time_h" = "xyes"; then
 fi
 
 if test "x$ac_cv_header_sys_sysctl_h" = "xyes"; then
-	AC_CHECK_DECLS([CTL_KERN, KERN_RANDOM, RANDOM_UUID, KERN_ARAND], [], [],
-	   [[#include <sys/sysctl.h>]]
+	AC_CHECK_DECLS([CTL_KERN, KERN_RANDOM, RANDOM_UUID, KERN_ARND], [], [],
+	   [[#include <sys/types.h>
+	     #include <sys/sysctl.h>]]
 	)
 fi