diff --git a/ompi/mca/mtl/mxm/mtl_mxm.h b/ompi/mca/mtl/mxm/mtl_mxm.h
index a0af115063..70bde80fc6 100644
--- a/ompi/mca/mtl/mxm/mtl_mxm.h
+++ b/ompi/mca/mtl/mxm/mtl_mxm.h
@@ -11,6 +11,8 @@
 #define MTL_MXM_H_HAS_BEEN_INCLUDED
 
 #include <stdint.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 #include <mxm/api/mxm_api.h>
 #include <mxm/api/mxm_addr.h>
diff --git a/ompi/mca/mtl/mxm/mtl_mxm_component.c b/ompi/mca/mtl/mxm/mtl_mxm_component.c
index 0442e01d0a..e9f125b281 100644
--- a/ompi/mca/mtl/mxm/mtl_mxm_component.c
+++ b/ompi/mca/mtl/mxm/mtl_mxm_component.c
@@ -10,7 +10,6 @@
 #include "ompi_config.h"
 
 #include "orte/util/show_help.h"
-#include "opal/mca/event/event.h"
 #include "opal/util/output.h"
 #include "opal/mca/base/mca_base_param.h"
 #include "ompi/proc/proc.h"
diff --git a/ompi/mca/mtl/mxm/mtl_mxm_endpoint.h b/ompi/mca/mtl/mxm/mtl_mxm_endpoint.h
index fbe3726982..f904c0890b 100644
--- a/ompi/mca/mtl/mxm/mtl_mxm_endpoint.h
+++ b/ompi/mca/mtl/mxm/mtl_mxm_endpoint.h
@@ -10,7 +10,6 @@
 #ifndef MCA_MTL_MXM_ENDPOINT_H
 #define MCA_MTL_MXM_ENDPOINT_H
 #include "opal/class/opal_list.h"
-#include "opal/mca/event/event.h"
 #include "ompi/mca/mtl/mtl.h"
 #include "mtl_mxm.h"