diff --git a/LICENSE b/LICENSE
index 0fc7a62d4..ba24a53c2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -14,6 +14,6 @@ subject to the following restrictions:
 */
 
 All files in the Bullet/src folder are under this Zlib license.
-Optional Extras/GIMPACT and Extras/GIMPACTBullet is also under ZLib license. Other optional files in  Extras/Demos have own license,see respective files.
+Optional Extras/GIMPACT and Extras/GIMPACTBullet is also under ZLib license. Other optional external libraries in  Extras/Demos have own license,see respective files.
 
 This means Bullet can freely be used in any software, including commercial and console software. A Playstation 3 optimized version is available through Sony.
diff --git a/src/ibmsdk/Makefile b/src/ibmsdk/Makefile
index 3f7d55ca2..6f52613c2 100644
--- a/src/ibmsdk/Makefile
+++ b/src/ibmsdk/Makefile
@@ -1,8 +1,10 @@
 #### Visit Bullet library ibmsdk dirs and build  code
+CELL_TOP ?= ../..
+
 DIRS :=					\
 ../BulletCollision/ibmsdk		\
 ../BulletDynamics/ibmsdk		\
 ../LinearMath/ibmsdk
 
 
-include $(TOP)/make.footer
+include $(CELL_TOP)/make.footer