diff --git a/core/src/main/scala/spire/math/Fractional.scala b/core/src/main/scala/spire/math/Fractional.scala
index ac422e7c1..e6c34a286 100644
--- a/core/src/main/scala/spire/math/Fractional.scala
+++ b/core/src/main/scala/spire/math/Fractional.scala
@@ -59,8 +59,6 @@ private[math] class DoubleIsFractional
     with ConvertableToDouble
     with DoubleIsReal
     with Serializable {
-  override def fromInt(n: Int): Double = n
-  override def fromDouble(n: Double): Double = n
   override def fromBigInt(n: BigInt): Double = n.toDouble
   override def toDouble(n: Double): Double = n.toDouble
   override def toRational(n: Double): Rational = super[DoubleIsReal].toRational(n)
diff --git a/core/src/main/scala/spire/math/Numeric.scala b/core/src/main/scala/spire/math/Numeric.scala
index dae0713d2..297652ea3 100644
--- a/core/src/main/scala/spire/math/Numeric.scala
+++ b/core/src/main/scala/spire/math/Numeric.scala
@@ -185,8 +185,6 @@ private[math] class DoubleIsNumeric
     with ConvertableToDouble
     with DoubleIsReal
     with Serializable {
-  override def fromInt(n: Int): Double = n.toDouble
-  override def fromDouble(n: Double): Double = n
   override def fromBigInt(n: BigInt): Double = n.toDouble
   override def toDouble(n: Double): Double = n.toDouble
   override def toRational(n: Double): Rational = super[DoubleIsReal].toRational(n)