1 files changed, 1 insertions, 1 deletions
diff --git a/marshal.c b/marshal.c
index c948a1d54d..464ef1596f 100644
--- a/marshal.c
+++ b/marshal.c
@@ -1613,7 +1613,7 @@ r_object0(struct load_arg *arg, int *ivp, VALUE extmod)
 	    BDIGIT *digits;
 	    VALUE data;
 
-	    NEWOBJ_OF(big, struct RBignum, rb_cBignum, T_BIGNUM);
+	    NEWOBJ_OF(big, struct RBignum, rb_cBignum, T_BIGNUM | (RGENGC_WB_PROTECTED_BIGNUM ? FL_WB_PROTECTED : 0));
 	    RBIGNUM_SET_SIGN(big, (r_byte(arg) == '+'));
 	    len = r_long(arg);
 	    data = r_bytes0(len * 2, arg);