diff --git a/ChangeLog b/ChangeLog
index d194b6e..2603ad0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-26  Chung-Lin Tang  <cltang@codesourcery.com>
+
+	* nptl/tst-join7mod.c: Add #include <string.h>.
+
 2015-07-25  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	* sysdeps/nios2/libm-test-ulps: Update.
diff --git a/nptl/tst-join7mod.c b/nptl/tst-join7mod.c
index 92bb381..a35db50 100644
--- a/nptl/tst-join7mod.c
+++ b/nptl/tst-join7mod.c
@@ -18,6 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <stdio.h>
+#include <string.h>
 #include <pthread.h>
 #include <atomic.h>