diff --git a/src/libc/include/errno.h b/src/libc/include/errno.h
index 0e401ad08..2e77ac97b 100644
--- a/src/libc/include/errno.h
+++ b/src/libc/include/errno.h
@@ -7,6 +7,81 @@
 #define EDOM        4   /* math domain error */
 #define ERANGE      5   /* math range error */
 
+// Not used, but defined for compatibility
+#define E2BIG           6 /* Argument list too long */
+#define EACCES          7 /* Permission denied */
+#define EADDRINUSE      8 /* Address in use */
+#define EADDRNOTAVAIL   9 /* Address not available */
+#define EAFNOSUPPORT    10 /* Address family not supported */
+#define EAGAIN          11 /* Resource unavailable, try again */
+#define EALREADY        12 /* Connection already in progress */
+#define EBADF           13 /* Bad file descriptor */
+#define EBADMSG         14 /* Bad message */
+#define EBUSY           15 /* Device or resource busy */
+#define ECANCELED       16 /* Operation canceled */
+#define ECHILD          17 /* No child processes */
+#define ECONNABORTED    18 /* Connection aborted */
+#define ECONNREFUSED    19 /* Connection refused */
+#define ECONNRESET      20 /* Connection reset */
+#define EDEADLK         21 /* Resource deadlock avoided */
+#define EDESTADDRREQ    22 /* Destination address required */
+#define EEXIST          23 /* File exists */
+#define EFAULT          24 /* Bad address */
+#define EFBIG           25 /* File too large */
+#define EHOSTUNREACH    26 /* Host is unreachable */
+#define EIDRM           27 /* Identifier removed */
+#define EILSEQ          28 /* Illegal byte sequence */
+#define EINPROGRESS     29 /* Operation in progress */
+#define EINTR           30 /* Interrupted function */
+#define EISCONN         31 /* Socket is connected */
+#define EISDIR          32 /* Is a directory */
+#define ELOOP           33 /* Too many levels of symbolic links */
+#define EMFILE          34 /* Too many open files */
+#define EMLINK          35 /* Too many links */
+#define EMSGSIZE        36 /* Message too long */
+#define ENAMETOOLONG    37 /* Filename too long */
+#define ENETDOWN        38 /* Network is down */
+#define ENETRESET       39 /* Connection aborted by network */
+#define ENETUNREACH     40 /* Network is unreachable */
+#define ENFILE          41 /* Too many open files in system */
+#define ENOBUFS         42 /* No buffer space available */
+#define ENODATA         43 /* No message is available on the STREAM head read queue */
+#define ENODEV          44 /* No such device */
+#define ENOENT          45 /* No such file or directory */
+#define ENOEXEC         46 /* Executable file format error */
+#define ENOLCK          47 /* No locks available */
+#define ENOLINK         48 /* Link has been severed */
+#define ENOMEM          49 /* Not enough space */
+#define ENOMSG          50 /* No message of desired type */
+#define ENOPROTOOPT     51 /* Protocol not available */
+#define ENOSPC          52 /* No space left on device */
+#define ENOSR           53 /* No stream resources */
+#define ENOSTR          54 /* Not a stream */
+#define ENOSYS          55 /* Function not implemented */
+#define ENOTCONN        56 /* The socket is not connected */
+#define ENOTDIR         57 /* Not a directory */
+#define ENOTEMPTY       58 /* Directory not empty */
+#define ENOTRECOVERABLE 59 /* State not recoverable */
+#define ENOTSOCK        60 /* Not a socket */
+#define ENOTSUP         61 /* Not supported */
+#define ENOTTY          62 /* Inappropriate I/O control operation */
+#define ENXIO           63 /* No such device or address */
+#define EOPNOTSUPP      64 /* Operation not supported on socket */
+#define EOVERFLOW       65 /* Value too large to be stored in data type */
+#define EOWNERDEAD      66 /* Previous owner died */
+#define EPIPE           67 /* Broken pipe */
+#define EPROTO          68 /* Protocol error */
+#define EPROTONOSUPPORT 69 /* Protocol not supported */
+#define EPROTOTYPE      70 /* Protocol wrong type for socket */
+#define EROFS           71 /* Read-only file system */
+#define ESPIPE          72 /* Invalid seek */
+#define ESRCH           73 /* No such process */
+#define ETIME           74 /* Stream ioctl() timeout */
+#define ETIMEDOUT       75 /* Connection timed out */
+#define ETXTBSY         76 /* Text file busy */
+#define EWOULDBLOCK     77 /* Operation would block */
+#define EXDEV           78 /* Cross-device link */
+
 extern int errno;
 
 #endif /* _ERRNO_H */