diff --git a/lib/libc/stdio/Makefile.inc b/lib/libc/stdio/Makefile.inc
index 63b81f31f5b2..204c52ee336f 100644
--- a/lib/libc/stdio/Makefile.inc
+++ b/lib/libc/stdio/Makefile.inc
@@ -15,7 +15,8 @@ SRCS+=	_flock_stub.c asprintf.c clrerr.c fclose.c fdopen.c feof.c ferror.c \
 	refill.c remove.c rewind.c rget.c scanf.c setbuf.c setbuffer.c \
 	setvbuf.c snprintf.c sprintf.c sscanf.c stdio.c swprintf.c swscanf.c \
 	tempnam.c tmpfile.c \
-	tmpnam.c ungetc.c ungetwc.c vasprintf.c vfprintf.c vfscanf.c \
+	tmpnam.c ungetc.c ungetwc.c unlocked.c vasprintf.c vfprintf.c \
+	vfscanf.c \
 	vfwprintf.c vfwscanf.c vprintf.c vscanf.c vsnprintf.c vsprintf.c \
 	vsscanf.c \
 	vswprintf.c vswscanf.c vwprintf.c vwscanf.c wbuf.c wprintf.c wscanf.c \
diff --git a/lib/libc/stdio/unlocked.c b/lib/libc/stdio/unlocked.c
new file mode 100644
index 000000000000..083d26f24ffd
--- /dev/null
+++ b/lib/libc/stdio/unlocked.c
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 2003 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+
+#undef getchar_unlocked
+int
+getchar_unlocked(void)
+{
+
+	return (__sgetc(stdin));
+}
+
+#undef getc_unlocked
+int
+getc_unlocked(FILE *fp)
+{
+
+	return (__sgetc(fp));
+}
+
+#undef putchar_unlocked
+int
+putchar_unlocked(int ch)
+{
+
+	return (__sputc(ch, stdout));
+}
+
+#undef putc_unlocked
+int
+putc_unlocked(int ch, FILE *fp)
+{
+
+	return (__sputc(ch, fp));
+}
+
+#undef feof_unlocked
+int
+feof_unlocked(FILE *fp)
+{
+
+	return (__sfeof(fp));
+}
+
+#undef ferror_unlocked
+int
+ferror_unlocked(FILE *fp)
+{
+
+	return (__sferror(fp));
+}
+
+#undef clearerr_unlocked
+void
+clearerr_unlocked(FILE *fp)
+{
+
+	__sclearerr(fp);
+}
+
+#undef fileno_unlocked
+int
+fileno_unlocked(FILE *fp)
+{
+
+	return (__sfileno(fp));
+}