diff --git a/library.properties b/library.properties
index 0867fb1..3b87f99 100644
--- a/library.properties
+++ b/library.properties
@@ -3,7 +3,7 @@ authors = [Jonathan Feinberg](http://mrfeinberg.com/)
 url = http://mrfeinberg.com/peasycam/
 categories = 3D
 sentence = A mouse driven camera-control library for 3D sketches.
-version = 202
-prettyVersion = 202
+version = 301
+prettyVersion = 301
 minRevision = 227
 maxRevision = 0
diff --git a/src/peasy/PeasyCam.java b/src/peasy/PeasyCam.java
index edc33cf..5c025ee 100644
--- a/src/peasy/PeasyCam.java
+++ b/src/peasy/PeasyCam.java
@@ -37,7 +37,7 @@
  */
 public class PeasyCam {
 	
-	public final String VERSION = "210";
+	public final String VERSION = "301";
 	
 	private static final Vector3D LOOK = Vector3D.plusK;
 	private static final Vector3D UP = Vector3D.plusJ;
@@ -334,7 +334,7 @@ public void mouseEvent(final MouseEvent e) {
 				break;
 
 			case MouseEvent.WHEEL:
-				if (insideViewport(p.mouseX, p.mouseY)) {
+				if (wheelHandler != null && insideViewport(p.mouseX, p.mouseY)) {
 					wheelHandler.handleWheel((int)e.getCount());
 				}
 				break;