diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ac9912df3..5488dbe9db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 2.8.3)
 project(px4)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 add_definitions(-D__PX4_ROS)
+add_definitions(-D__EXPORT=)
 
 ## Find catkin macros and libraries
 ## if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)