diff --git a/btgui/OpenGLWindow/CMakeLists.txt b/btgui/OpenGLWindow/CMakeLists.txt
index 5d4460818..f552958bb 100644
--- a/btgui/OpenGLWindow/CMakeLists.txt
+++ b/btgui/OpenGLWindow/CMakeLists.txt
@@ -53,6 +53,13 @@ endif ()
 
 if (BUILD_SHARED_LIBS)
   target_link_libraries(OpenGLWindow Bullet3Common)
+  if (WIN32 OR APPLE)
+   target_link_libraries(OpenGLWindow ${OPENGL_gl_LIBRARY})
+  else()
+	set (CMAKE_THREAD_PREFER_PTHREAD TRUE)
+        FIND_PACKAGE(Threads)
+   	target_link_libraries(OpenGLWindow ${CMAKE_THREAD_LIBS_INIT})
+  endif()
 endif()
 
-target_link_libraries(OpenGLWindow ${OPENGL_gl_LIBRARY})
+#target_link_libraries(OpenGLWindow ${OPENGL_gl_LIBRARY})