diff --git a/engine/src/bullet-common/com/jme3/bullet/PhysicsTickListener.java b/engine/src/bullet-common/com/jme3/bullet/PhysicsTickListener.java
index f34753ba8..5bc494133 100644
--- a/engine/src/bullet-common/com/jme3/bullet/PhysicsTickListener.java
+++ b/engine/src/bullet-common/com/jme3/bullet/PhysicsTickListener.java
@@ -42,13 +42,13 @@ public interface PhysicsTickListener {
      * @param space the physics space
      * @param tpf the time per frame in seconds 
      */
-    public void prePhysicsTick(PhysicsSpace space, float f);
+    public void prePhysicsTick(PhysicsSpace space, float tpf);
 
     /**
      * Called after the physics has been stepped, use to check for forces etc.
      * @param space the physics space
      * @param tpf the time per frame in seconds
      */
-    public void physicsTick(PhysicsSpace space, float f);
+    public void physicsTick(PhysicsSpace space, float tpf);
 
 }