1 files changed, 1 insertions, 1 deletions
diff --git a/marshal.c b/marshal.c
index f726dfc706..8263e48861 100644
--- a/marshal.c
+++ b/marshal.c
@@ -665,7 +665,7 @@ r_object(arg)
 	    }
 	    big = RBIGNUM(big_norm((VALUE)big));
 	    if (TYPE(big) == T_BIGNUM) {
-		r_regist(big, arg);
+		r_regist((VALUE)big, arg);
 	    }
 	    return (VALUE)big;
 	}