diff --git a/libc/Kconfig b/libc/Kconfig
index 07f549c08c7..e95cd245a9e 100644
--- a/libc/Kconfig
+++ b/libc/Kconfig
@@ -38,8 +38,8 @@ config NOPRINTF_FIELDWIDTH
 	bool "Disable sprintf support fieldwidth"
 	default n
 	---help---
-	sprintf-related logic is a
-	little smaller if we do not support fieldwidthes
+		sprintf-related logic is a little smaller if we do not support field
+		widths.
 
 config LIBC_FLOATINGPOINT
 	bool "Enable floating point in printf"
diff --git a/libc/Makefile b/libc/Makefile
index 7404b9c5e88..8412f8d884a 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -66,6 +66,7 @@ include stdlib/Make.defs
 include unistd/Make.defs
 include sched/Make.defs
 include string/Make.defs
+include aio/Make.defs
 include pthread/Make.defs
 include semaphore/Make.defs
 include signal/Make.defs
diff --git a/libc/aio/Make.defs b/libc/aio/Make.defs
new file mode 100644
index 00000000000..9ba862058ab
--- /dev/null
+++ b/libc/aio/Make.defs
@@ -0,0 +1,46 @@
+############################################################################
+# libc/aio/Make.defs
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# 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.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+# COPYRIGHT OWNER 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.
+#
+############################################################################
+
+ifneq ($(CONFIG_DISABLE_PTHREAD),y)
+
+# Add the asynchronous I/O C files to the build
+
+# CSRCS += 
+
+# Add the asynchronous I/O directory to the build
+
+DEPPATH += --dep-path aio
+VPATH += :aio
+endif