diff --git a/ChangeLog b/ChangeLog
index 86860d7192..1c55950924 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Dec  2 07:41:08 2015  Eric Wong  <e@80x24.org>
+
+	* missing/explicit_bzero.c (explicit_bzero): fixup r52839
+	  for compilers with "weak" attribute
+
 Wed Dec  2 06:47:25 2015  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* missing/explicit_bzero.c: add ruby_explicit_bzero_hook_unused
diff --git a/missing/explicit_bzero.c b/missing/explicit_bzero.c
index 061e72f800..baa4624d13 100644
--- a/missing/explicit_bzero.c
+++ b/missing/explicit_bzero.c
@@ -49,7 +49,7 @@ ruby_explicit_bzero_hook_unused(void *buf, size_t len)
 void
 explicit_bzero(void *b, size_t len)
 {
-    memset(b, len);
+    memset(b, 0, len);
     ruby_explicit_bzero_hook_unused(b, len);
 }