diff --git a/docs/modules/core/pages/collision/terrain_collision.adoc b/docs/modules/core/pages/collision/terrain_collision.adoc
index 9c8b031fb5..cd44159d70 100644
--- a/docs/modules/core/pages/collision/terrain_collision.adoc
+++ b/docs/modules/core/pages/collision/terrain_collision.adoc
@@ -156,7 +156,7 @@ public class HelloTerrainCollision extends SimpleApplication
 
     // You can change the gravity of individual physics objects after they are
     // added to the PhysicsSpace.
-    player.setGravity(new Vector3f(0,-30f,0));
+    player.setGravity(-30f);
 
   }
   /** We over-write some navigational key mappings here, so we can