1 files changed, 1 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index 04d438445d..d6c25b1a2f 100644
--- a/bignum.c
+++ b/bignum.c
@@ -645,7 +645,7 @@ rb_big2str0(x, base, trim)
 	j /= 3;
 	break;
       case 10: case 11: case 12: case 13: case 14: case 15:
-	j = j * 241L / 800;
+	j = j * 241L / 800 + 1;
 	break;
       case 16: case 17: case 18: case 19: case 20: case 21:
       case 22: case 23: case 24: case 25: case 26: case 27: