diff --git a/include/bout/petsc_interface.hxx b/include/bout/petsc_interface.hxx
index 8f11f4bddf..1378419872 100644
--- a/include/bout/petsc_interface.hxx
+++ b/include/bout/petsc_interface.hxx
@@ -37,8 +37,6 @@
 #include <algorithm>
 #include <iterator>
 #include <memory>
-#include <petscsystypes.h>
-#include <petscvec.h>
 #include <type_traits>
 #include <vector>
 
@@ -52,6 +50,9 @@
 #include <bout/region.hxx>
 #include <bout/traits.hxx>
 
+#include <petscsystypes.h>
+#include <petscvec.h>
+
 /*!
  * A class which wraps PETSc vector objects, allowing them to be
  * indexed using the BOUT++ scheme. Note that boundaries are only