1 files changed, 3 insertions, 0 deletions
diff --git a/bignum.c b/bignum.c
index f56d5a6377..31a5f58c24 100644
--- a/bignum.c
+++ b/bignum.c
@@ -464,6 +464,9 @@ rb_cstr_to_inum(str, base, badcheck)
 	    }
 	    continue;
 	}
+	else if (!ISASCII(c)) {
+	    break;
+	}
 	else if (isdigit(c)) {
 	    c -= '0';
 	}