diff --git a/libs/libc/include/errno.h b/libs/libc/include/errno.h
index 242141b6..8b3aa436 100644
--- a/libs/libc/include/errno.h
+++ b/libs/libc/include/errno.h
@@ -4,33 +4,76 @@
 /* The last error encountered during a call to a library or system function. */
 extern int errno;
 
-#define EPERM 1       // Operation not permitted
-#define ENOENT 2      // No such file or directory
-#define ESRCH 3       // No such process
-#define EINTR 4       // Interrupted system call. Not implemented.
-#define EIO 5         // Input/output error. Not implemented.
-#define E2BIG 7       // Argument list too long
-#define ENOEXEC 8     // Exec format error
-#define EBADF 9       // Bad file descriptor
-#define ECHILD 10     // No child processes
-#define EAGAIN 11     // Resource temporarily unavailable
-#define ENOMEM 12     // Cannot allocate memory
-#define EACCES 13     // Permission denied
-#define EFAULT 14     // Bad address
-#define EEXIST 17     // File exists
-#define ENOTDIR 20    // Not a directory
-#define EISDIR 21     // Is a directory
-#define EINVAL 22     // Invalid argument
-#define EMFILE 24     // Too many open files
-#define ENOTTY 25     // Inappropriate ioctl for device
-#define EFBIG 27      // File too large. Not implemented.
-#define ENOSPC 28     // No space left on device
-#define EPIPE 32      // Broken pipe. Not implemented.
-#define EDOM 33       // Numerical argument out of domain. Not implemented.
-#define ERANGE 34     // Numerical result out of range
-#define ENOSYS 38     // Function not implemented
-#define ENOTSUP 95    // Operation not supported
-#define EOPNOTSUPP 95 // Operation not supported
+#define EPERM 1         // Operation not permitted
+#define ENOENT 2        // No such file or directory
+#define ESRCH 3         // No such process
+#define EINTR 4         // Interrupted system call. Not implemented.
+#define EIO 5           // Input/output error. Not implemented.
+#define ENXIO 6         // No such device or address. Not implemented.
+#define E2BIG 7         // Argument list too long
+#define ENOEXEC 8       // Exec format error
+#define EBADF 9         // Bad file descriptor
+#define ECHILD 10       // No child processes
+#define EAGAIN 11       // Resource temporarily unavailable
+#define EWOULDBLOCK 11  // Resource temporarily unavailable
+#define ENOMEM 12       // Cannot allocate memory
+#define EACCES 13       // Permission denied
+#define EFAULT 14       // Bad address
+#define EBUSY 16        // Device or resource busy. Not implemented.
+#define EEXIST 17       // File exists
+#define EXDEV 18        // Invalid cross-device link. Not implemented.
+#define ENODEV 19       // No such device. Not implemented.
+#define ENOTDIR 20      // Not a directory
+#define EISDIR 21       // Is a directory
+#define EINVAL 22       // Invalid argument
+#define ENFILE 23       // Too many open files in system. Not implemented.
+#define EMFILE 24       // Too many open files
+#define ENOTTY 25       // Inappropriate ioctl for device
+#define EFBIG 27        // File too large. Not implemented.
+#define ENOSPC 28       // No space left on device
+#define ESPIPE 29       // Illegal seek. Not implemented.
+#define EROFS 30        // Read-only file system. Not implemented.
+#define EMLINK 31       // Too many links. Not implemented.
+#define EPIPE 32        // Broken pipe. Not implemented.
+#define EDOM 33         // Numerical argument out of domain. Not implemented.
+#define ERANGE 34       // Numerical result out of range
+#define EDEADLK 35      // Resource deadlock avoided. Not implemented.
+#define ENAMETOOLONG 36 // File name too long. Not implemented.
+#define ENOLCK 37       // No locks available. Not implemented.
+#define ENOSYS 38       // Function not implemented
+#define ENOTEMPTY 39    // Directory not empty. Not implemented.
+#define ELOOP 40        // Too many levels of symbolic links. Not implemented.
+#define ENOMSG 42       // No message of desired type. Not implemented.
+#define EILSEQ 84       // Invalid or incomplete multibyte or wide character. Not implemented.
+#define ENOTSOCK 88     // Socket operation on non-socket. Not implemented.
+#define ENOTSUP 95      // Operation not supported
+#define EOPNOTSUPP 95   // Operation not supported
+#define EADDRINUSE 98   // Address already in use. Not implemented.
+#define ENETRESET 102   // Network dropped connection on reset. Not implemented.
+#define ECONNRESET 104  // Connection reset by peer. Not implemented.
+#define EISCONN 106     // Transport endpoint is already connected. Not implemented.
+#define ETIMEDOUT 110   // Connection timed out. Not implemented.
+#define EALREADY 114    // Operation already in progress. Not implemented.
+
+// FIXME: Right now I don't want to have to order and label these, since we have no net support anyways.
+#define EADDRNOTAVAIL -1
+#define EAFNOSUPPORT -1
+#define ECONNABORTED -1
+#define ECONNREFUSED -1
+#define EDESTADDRREQ -1
+#define EHOSTUNREACH -1
+#define EINPROGRESS -1
+#define EMSGSIZE -1
+#define ENETDOWN -1
+#define ENETRESET -1
+#define ENETUNREACH -1
+#define ENOBUFS -1
+#define ENOMSG -1
+#define ENOPROTOOPT -1
+#define ENOTCONN -1
+#define ENOTSOCK -1
+#define EPROTONOSUPPORT -1
+#define EPROTOTYPE -1
 
 #ifdef _GNU_SOURCE // Give it only to programs that ask for it.
 /* Name used to invoke calling program. Same value as argv[0] in main(), but can be used globally. */