3 files changed, 21 insertions, 2 deletions
diff --git a/src/library/scala/math/Numeric.scala b/src/library/scala/math/Numeric.scala
index 1f4e3c9865..ee62706e49 100644
--- a/src/library/scala/math/Numeric.scala
+++ b/src/library/scala/math/Numeric.scala
@@ -36,8 +36,8 @@ object Numeric {
     def fromInt(x: Int): BigInt = BigInt(x)
     def toInt(x: BigInt): Int = x.intValue
     def toLong(x: BigInt): Long = x.longValue
-    def toFloat(x: BigInt): Float = x.longValue.toFloat
-    def toDouble(x: BigInt): Double = x.longValue.toDouble
+    def toFloat(x: BigInt): Float = x.floatValue
+    def toDouble(x: BigInt): Double = x.doubleValue
   }
   implicit object BigIntIsIntegral extends BigIntIsIntegral with Ordering.BigIntOrdering
 
diff --git a/test/files/jvm/si5471.check b/test/files/jvm/si5471.check
new file mode 100644
index 0000000000..bb101b641b
--- /dev/null
+++ b/test/files/jvm/si5471.check
@@ -0,0 +1,2 @@
+true
+true
diff --git a/test/files/jvm/si5471.scala b/test/files/jvm/si5471.scala
new file mode 100644
index 0000000000..2c8c4205c5
--- /dev/null
+++ b/test/files/jvm/si5471.scala
@@ -0,0 +1,17 @@
+
+object Test {
+
+  def main(args: Array[String]) {
+    import scala.math.Numeric
+    import scala.math.Numeric.Implicits._
+    
+    val b = BigInt(Long.MaxValue) + 1
+
+    def dbl[N :Numeric](n: N) = n.toDouble
+    def flt[N :Numeric](n: N) = n.toFloat
+    
+    println(dbl(b) == b.toDouble)
+    println(flt(b) == b.toFloat)
+  }
+
+}