diff --git a/src/Bullet3OpenCL/CMakeLists.txt b/src/Bullet3OpenCL/CMakeLists.txt
index b93b80b..c9c985c 100644
--- a/src/Bullet3OpenCL/CMakeLists.txt
+++ b/src/Bullet3OpenCL/CMakeLists.txt
@@ -1,3 +1,8 @@
+option(BUILD_OPENCL "Build Bullet3OpenCL_clew")
+if(NOT BUILD_OPENCL)
+	return()
+endif()
+
 INCLUDE_DIRECTORIES( ${BULLET_PHYSICS_SOURCE_DIR}/src  )
 
 ADD_DEFINITIONS(-DB3_USE_CLEW)