diff --git a/src/mca/topo/unity/src/topo_unity.h b/src/mca/topo/unity/src/topo_unity.h
index 185cae491e..3c8401e3fb 100644
--- a/src/mca/topo/unity/src/topo_unity.h
+++ b/src/mca/topo/unity/src/topo_unity.h
@@ -21,7 +21,7 @@
  * version information and the four functions (see below) which
  * are needed for this module to function with the MCA framework
  */
-//OMPI_COMP_EXPORT extern struct mca_topo_base_module_1_0_0_t mca_topo_unity_module;
+/*OMPI_COMP_EXPORT extern struct mca_topo_base_module_1_0_0_t mca_topo_unity_module;*/
 
 
 /*