--- a/src/libgo/mksysinfo.sh
+++ b/src/libgo/mksysinfo.sh
@@ -210,6 +210,11 @@
   egrep '#define E[A-Z0-9_]+ ' | \
   sed -e 's/^#define \(E[A-Z0-9_]*\) .*$/const \1 = Errno(_\1)/' >> ${OUT}
 
+# Special treatment of EWOULDBLOCK for GNU/Hurd
+# /usr/include/bits/errno.h: #define EWOULDBLOCK EAGAIN
+egrep '^const EWOULDBLOCK = Errno(_EWOULDBLOCK)' ${OUT} | \
+    sed -i.bak -e 's/_EWOULDBLOCK/_EAGAIN/' ${OUT}
+
 # The O_xxx flags.
 egrep '^const _(O|F|FD)_' gen-sysinfo.go | \
   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
@@ -225,6 +230,11 @@
   echo "const F_DUPFD_CLOEXEC = 0" >> ${OUT}
 fi
 
+# Special treatment of SYS_FCNTL for GNU/Hurd
+if ! grep '^const SYS_FCNTL' ${OUT} >/dev/null 2>&1; then
+  echo "const SYS_FCNTL = 0" >> ${OUT}
+fi
+
 # These flags can be lost on i386 GNU/Linux when using
 # -D_FILE_OFFSET_BITS=64, because we see "#define F_SETLK F_SETLK64"
 # before we see the definition of F_SETLK64.
@@ -528,6 +538,15 @@
 
 # The stat type.
 # Prefer largefile variant if available.
+# Special treatment of st_dev for GNU/Hurd
+# /usr/include/i386-gnu/bits/stat.h: #define st_dev st_fsid
+if grep 'define st_dev st_fsid' gen-sysinfo.go >/dev/null 2>&1; then
+ grep '^type _stat ' gen-sysinfo.go | \
+ sed -i.bak -e 's/st_fsid\([^;]*\)/st_fsid\1; st_dev\1/' gen-sysinfo.go
+ grep '^type _stat ' ${OUT} | \
+ sed -i.bak -e 's/st_fsid\([^;]*\)/&; st_dev\1/' ${OUT}
+fi
+#         -e 's/st_fsid/Dev/'
 stat=`grep '^type _stat64 ' gen-sysinfo.go || true`
 if test "$stat" != ""; then
   grep '^type _stat64 ' gen-sysinfo.go