--- squashfs-tools/unsquashfs.c
+++ squashfs-tools/unsquashfs.c
@@ -52,8 +52,10 @@
 #define __BYTE_ORDER BYTE_ORDER
 #define __BIG_ENDIAN BIG_ENDIAN
 #define __LITTLE_ENDIAN LITTLE_ENDIAN
+#include <sys/sysctl.h> // sysctl
 #else
 #include <endian.h>
+#include <sys/sysinfo.h> // get_nprocs()
 #endif
 
 #include "squashfs_fs.h"