diff --git a/src/tools/mpirun/mpirun2.c b/src/tools/mpirun/mpirun2.c
index 464be62943..9675c95f4d 100644
--- a/src/tools/mpirun/mpirun2.c
+++ b/src/tools/mpirun/mpirun2.c
@@ -18,6 +18,7 @@
 #include "runtime/runtime.h"
 #include "util/session_dir.h"
 #include "include/constants.h"
+#include "util/output.h"
 
 #include <stdio.h>
 #include <unistd.h>