diff --git a/ChangeLog b/ChangeLog
index a0387bddb6..8fe6c2a527 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-05-24  Ondřej Bílka  <neleai@seznam.cz>
+
+	[BZ #15381]
+	* libio/genops.c (_IO_no_init): Initialize wide struct info.
+
 2013-05-23  Edjunior Machado  <emachado@linux.vnet.ibm.com>
 
 	[BZ #14894]
diff --git a/NEWS b/NEWS
index 152e7a4caa..1d0d4f21ed 100644
--- a/NEWS
+++ b/NEWS
@@ -16,9 +16,9 @@ Version 2.18
   15007, 15014, 15020, 15023, 15036, 15054, 15055, 15062, 15078, 15084,
   15085, 15086, 15160, 15214, 15221, 15232, 15234, 15283, 15285, 15287,
   15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336, 15337, 15339,
-  15342, 15346, 15359, 15361, 15366, 15380, 15394, 15395, 15405, 15406,
-  15409, 15416, 15418, 15419, 15423, 15424, 15426, 15429, 15441, 15442,
-  15448, 15480, 15485, 15488, 15490, 15493, 15497, 15506.
+  15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394, 15395, 15405,
+  15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426, 15429, 15441,
+  15442, 15448, 15480, 15485, 15488, 15490, 15493, 15497, 15506.
 
 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
   #15078).
diff --git a/libio/genops.c b/libio/genops.c
index 390d8d24b5..e5c5d5cafe 100644
--- a/libio/genops.c
+++ b/libio/genops.c
@@ -661,6 +661,10 @@ _IO_no_init (fp, flags, orientation, wd, jmp)
 
       fp->_wide_data->_wide_vtable = jmp;
     }
+  else
+    /* Cause predictable crash when a wide function is called on a byte
+       stream.  */
+    fp->_wide_data = (struct _IO_wide_data *) -1L;
 #endif
   fp->_freeres_list = NULL;
 }