diff --git a/ChangeLog b/ChangeLog
index 4b38c27782..49691359f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Oct  2 21:37:04 2013  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* random.c (make_seed_value): a local array declaration was accessed
+	  out of scope.  Coverity Scan found this bug.
+
 Wed Oct  2 18:52:40 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c: relax GC condition due to malloc_limit.
diff --git a/random.c b/random.c
index 289c24d4c4..4026614044 100644
--- a/random.c
+++ b/random.c
@@ -495,10 +495,10 @@ make_seed_value(const uint32_t *ptr)
 {
     VALUE seed;
     size_t len;
+    uint32_t buf[DEFAULT_SEED_CNT+1];
 
     if (ptr[DEFAULT_SEED_CNT-1] <= 1) {
         /* set leading-zero-guard */
-        uint32_t buf[DEFAULT_SEED_CNT+1];
         MEMCPY(buf, ptr, uint32_t, DEFAULT_SEED_CNT);
         buf[DEFAULT_SEED_CNT] = 1;
         ptr = buf;