diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 505f9af38c..517dfeffb1 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,7 @@
+2013-04-07  Carlos O'Donell  <carlos@redhat.com>
+
+	* sysdeps/unix/sysv/linux/sem_post.c: Include atomic.h.
+
 2013-04-04  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
 	[BZ #15337]
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c
index 6d3657c36a..622c7b0b0c 100644
--- a/nptl/sysdeps/unix/sysv/linux/sem_post.c
+++ b/nptl/sysdeps/unix/sysv/linux/sem_post.c
@@ -17,6 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#include <atomic.h>
 #include <errno.h>
 #include <sysdep.h>
 #include <lowlevellock.h>