diff --git a/reorder_dyadic_vectors.cc b/reorder_dyadic_vectors.cc
index c9f1ed4923246464d1e5d1379dcfe5c8745ccbb4..4baf963aaf14e921d8eca0c71b7015a7a22d444f 100644
--- a/reorder_dyadic_vectors.cc
+++ b/reorder_dyadic_vectors.cc
@@ -7,7 +7,7 @@
 /*  CCOPYRIGHT */
 
 #include "utils/options.h"
-#include "heap.h"
+#include <heap.h>
 #include "newimage/newimageall.h"
 #include "miscmaths/miscprob.h"
 #include "stdlib.h"