diff --git a/ChangeLog b/ChangeLog
index e87c0c5e4e..2eb4ed5d93 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Dec 14 12:01:26 2005  Tanaka Akira  <akr@m17n.org>
+
+	* marshal.c (r_object0): fix a GC problem for reading a bignum on 
+	  IA64 with gcc 3.3.5 (Debian 1:3.3.5-13).
+
 Tue Dec 13 12:23:47 2005  Tanaka Akira  <akr@m17n.org>
 
 	* re.c (rb_reg_regcomp): fix a GC problem on x86_64 with
diff --git a/marshal.c b/marshal.c
index 3791c4c79a..51771fdf52 100644
--- a/marshal.c
+++ b/marshal.c
@@ -1107,7 +1107,7 @@ r_object0(arg, proc, ivp, extmod)
 	{
 	    long len;
 	    BDIGIT *digits;
-	    VALUE data;
+	    volatile VALUE data;
 
 	    NEWOBJ(big, struct RBignum);
 	    OBJSETUP(big, rb_cBignum, T_BIGNUM);