diff --git a/ompi/mca/topo/topo.h b/ompi/mca/topo/topo.h
index 6b8d9ee637..64ac66347b 100644
--- a/ompi/mca/topo/topo.h
+++ b/ompi/mca/topo/topo.h
@@ -22,6 +22,7 @@
 #include "mpi.h"
 #include "mca/mca.h"
 #include "mca/base/base.h"
+#include "proc/proc.h"
 
 /*
  * ******************************************************************