diff --git a/gl/lib/mbbuf.h b/gl/lib/mbbuf.h
index 715bec6c3..63557fdce 100644
--- a/gl/lib/mbbuf.h
+++ b/gl/lib/mbbuf.h
@@ -25,6 +25,7 @@
 
 #include <stdio.h>
 #include <stddef.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "fseterr.h"
diff --git a/gnulib b/gnulib
index fb7312fa8..e2fb3d721 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit fb7312fa8d3df29f0ca0678f669b9a5b88a078ec
+Subproject commit e2fb3d721a7dc65bee6ddc887ccb0d1bdd7291e2