diff --git a/src/OpenFOAM/db/dictionary/dictionary.H b/src/OpenFOAM/db/dictionary/dictionary.H
index 31ac3142378cb5d10013fa0b7e1ac20191dfacf7..a49c97bec49a43ddcdd1a05b7e9abacecf1ba084 100644
--- a/src/OpenFOAM/db/dictionary/dictionary.H
+++ b/src/OpenFOAM/db/dictionary/dictionary.H
@@ -400,7 +400,7 @@ public:
             //- Clear the dictionary
             void clear();
 
-            //- Transfer the contents of the argument and annull the argument.
+            //- Transfer the contents of the argument and annul the argument.
             void transfer(dictionary&);
 
             //- Transfer contents to the Xfer container
diff --git a/src/OpenFOAM/matrices/Matrix/Matrix.H b/src/OpenFOAM/matrices/Matrix/Matrix.H
index b674956e2f2f1e9d8fc2b3fb36ccd01f5c0e3ef2..0847578edd5682463abdbc987f7ef28cbd9b194e 100644
--- a/src/OpenFOAM/matrices/Matrix/Matrix.H
+++ b/src/OpenFOAM/matrices/Matrix/Matrix.H
@@ -151,7 +151,7 @@ public:
             void clear();
 
             //- Transfer the contents of the argument Matrix into this Matrix
-            //  and annull the argument Matrix.
+            //  and annul the argument Matrix.
             void transfer(Matrix<Form, Type>&);
 
 
diff --git a/src/surfMesh/MeshedSurface/MeshedSurface.H b/src/surfMesh/MeshedSurface/MeshedSurface.H
index ea7125fa833b780b6634b4ecd3b56854fccf26ff..459329bed3b87d3bb4c8eef4298943f5edddf78c 100644
--- a/src/surfMesh/MeshedSurface/MeshedSurface.H
+++ b/src/surfMesh/MeshedSurface/MeshedSurface.H
@@ -396,10 +396,10 @@ public:
             const labelHashSet& include
         ) const;
 
-        //- Transfer the contents of the argument and annull the argument
+        //- Transfer the contents of the argument and annul the argument
         void transfer(MeshedSurface<Face>&);
 
-        //- Transfer the contents of the argument and annull the argument
+        //- Transfer the contents of the argument and annul the argument
         void transfer(UnsortedMeshedSurface<Face>&);
 
         //- Transfer contents to the Xfer container
diff --git a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
index bb4fa01b379a3080bb8a75459a7eb569073ce6bc..7e16cc909dbd675735184554d4d2948cf0f25f17 100644
--- a/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
+++ b/src/surfMesh/UnsortedMeshedSurface/UnsortedMeshedSurface.H
@@ -334,10 +334,10 @@ public:
                 const Xfer< List<label> >& zoneIds
             );
 
-            //- Transfer the contents of the argument and annull the argument
+            //- Transfer the contents of the argument and annul the argument
             void transfer(UnsortedMeshedSurface<Face>&);
 
-            //- Transfer the contents of the argument and annull the argument
+            //- Transfer the contents of the argument and annul the argument
             void transfer(MeshedSurface<Face>&);
 
             //- Transfer contents to the Xfer container
diff --git a/src/surfMesh/surfMesh/surfMesh.H b/src/surfMesh/surfMesh/surfMesh.H
index 3215bfd345ae767a0a81d96a8128972f1bd40e98..48879918a0dca4dec76dcba5705d3c1e753dcfbd 100644
--- a/src/surfMesh/surfMesh/surfMesh.H
+++ b/src/surfMesh/surfMesh/surfMesh.H
@@ -257,7 +257,7 @@ public:
             );
 
 
-            //- Transfer the contents of the argument and annull the argument
+            //- Transfer the contents of the argument and annul the argument
             void transfer(MeshedSurface<face>&);