1 files changed, 1 insertions, 1 deletions
diff --git a/time.c b/time.c
index 62e4235603..1b461bbb34 100644
--- a/time.c
+++ b/time.c
@@ -345,7 +345,7 @@ rb_big_abs_find_minbit(VALUE big)
         return Qnil;
     res = mul(LONG2NUM(i), INT2FIX(SIZEOF_BDIGITS * CHAR_BIT));
     d = ds[i];
-    res = add(res, LONG2FIX(bdigit_find_maxbit(d & -d)));
+    res = add(res, LONG2FIX(bdigit_find_maxbit(d & (~d+1))));
     return res;
 }