1 files changed, 7 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index 2a1601bf5b..cbb0699209 100644
--- a/bignum.c
+++ b/bignum.c
@@ -561,7 +561,13 @@ rb_big_cmp(x, y)
 	break;
 
       case T_FLOAT:
-	y = dbl2big(RFLOAT(y)->value);
+        {
+	  double d = rb_big2dbl(x);
+
+	  if (d == RFLOAT(y)->value) return INT2FIX(0);
+	  if (d > RFLOAT(y)->value) return INT2FIX(1);
+	  if (d < RFLOAT(y)->value) return INT2FIX(-1);
+	}
 	break;
 
       default: