diff --git a/Calculator.java b/Calculator.java
index bc5c9f6..8469aff 100644
--- a/Calculator.java
+++ b/Calculator.java
@@ -141,7 +141,7 @@ public double cubeVol(double s) {
 	 *            the radius
 	 * @return the volume of a sphere with radius r.
 	 */
-	public double sphVol(double r) {
+	public double sphereVolume(double r) {
 		return 2 * Math.PI * r;
 	}
 }