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diff --git a/guile18/libguile/strerror.c b/guile18/libguile/strerror.c
new file mode 100644
index 0000000000..c2f20f0c22
--- /dev/null
+++ b/guile18/libguile/strerror.c
@@ -0,0 +1,34 @@
+/* Turning errno values into English error messages.
+   Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 2000, 2001, 2006 Free Software Foundation, Inc.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+ 
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+char *
+strerror (int errnum)
+{
+  extern char *sys_errlist[];
+  extern int sys_nerr;
+
+  if (errnum >= 0 && errnum < sys_nerr)
+    return sys_errlist[errnum];
+  return (char *) "Unknown error";
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/