diff --git a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
index a54438f105..b4148405cf 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
+++ b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
@@ -1078,7 +1078,11 @@ void Foam::polyBoundaryMesh::updateMesh()
 }
 
 
-void Foam::polyBoundaryMesh::reorder(const labelUList& oldToNew)
+void Foam::polyBoundaryMesh::reorder
+(
+    const labelUList& oldToNew,
+    const bool validBoundary
+)
 {
     // Change order of patches
     polyPatchList::reorder(oldToNew);
@@ -1091,7 +1095,10 @@ void Foam::polyBoundaryMesh::reorder(const labelUList& oldToNew)
         patches[patchI].index() = patchI;
     }
 
-    updateMesh();
+    if (validBoundary)
+    {
+        updateMesh();
+    }
 }
 
 
diff --git a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
index 34f0a6d409..ad937a86fd 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
+++ b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
@@ -219,9 +219,10 @@ public:
 
         //- Reorders patches. Ordering does not have to be done in
         //  ascending or descending order. Reordering has to be unique.
-        //  (is shuffle) Calls updateMesh() after reordering to recalculate
-        //  data.
-        void reorder(const labelUList&);
+        //  (is shuffle) If validBoundary calls updateMesh()
+        //  after reordering to recalculate data (so call needs to be parallel
+        //  sync in that case)
+        void reorder(const labelUList&, const bool validBoundary);
 
         //- writeData member function required by regIOobject
         bool writeData(Ostream&) const;