diff --git a/orte/mca/sensor/base/sensor_base_select.c b/orte/mca/sensor/base/sensor_base_select.c
index dd4cd83046..380c8c91a5 100644
--- a/orte/mca/sensor/base/sensor_base_select.c
+++ b/orte/mca/sensor/base/sensor_base_select.c
@@ -19,6 +19,7 @@
 #include "opal/mca/mca.h"
 #include "opal/mca/base/base.h"
 #include "opal/util/argv.h"
+#include "opal/util/output.h"
 
 #include "orte/mca/sensor/base/base.h"