diff --git a/ChangeLog b/ChangeLog
index d7bcedfb32..f8e9c50565 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-08-06  Paul Pluzhnikov  <ppluzhnikov@google.com>
+
+	* libio/oldfileops.c: Include unistd.h.
+
 2015-08-06  Mike Frysinger  <vapier@gentoo.org>
 
 	* stdlib/isomac.c: Include ctype.h.
diff --git a/libio/oldfileops.c b/libio/oldfileops.c
index 54789b2349..25797c830e 100644
--- a/libio/oldfileops.c
+++ b/libio/oldfileops.c
@@ -41,6 +41,7 @@
 #include <string.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <unistd.h>
 #ifndef errno
 extern int errno;
 #endif