diff --git a/ChangeLog b/ChangeLog
index 6f4cc3014b..1c3733f528 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 16 19:55:32 2014  Naohisa Goto  <ngotogenome@gmail.com>
+
+	* vm_core.h (struct rb_iseq_struct): temporal workaround of [Bug 10037].
+	  Add padding on big-endian 64-bit architecture (e.g. sparc64).
+
 Wed Jul 16 19:32:23 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c (fole_record_method_missing): call
diff --git a/vm_core.h b/vm_core.h
index 39dce05c99..b284351b52 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -205,6 +205,9 @@ struct rb_iseq_struct {
 	ISEQ_TYPE_MAIN,
 	ISEQ_TYPE_DEFINED_GUARD
     } type;              /* instruction sequence type */
+#if defined(WORDS_BIGENDIAN) && (SIZEOF_VALUE > SIZEOF_INT)
+    char dummy[SIZEOF_VALUE - SIZEOF_INT]; /* [Bug #10037][ruby-core:63721] */
+#endif
     uint32_t stack_max; /* for stack overflow check */
 
     rb_iseq_location_t location;