diff --git a/doc/lattice.html b/doc/lattice.html
index e5ca1c046c..8ea72b91ba 100644
--- a/doc/lattice.html
+++ b/doc/lattice.html
@@ -109,13 +109,13 @@ It has 2 basis atoms, one at the corner and one at the center of the
 rectangle.
 </P>
 <P>A lattice of style <I>custom</I> allows you to specify a1, a2, a3, and a
-list of basis atoms to put in the unit cell.  By default, a1,a2,a3 are
-3 orthogonal unit vectors (edges of a unit cube).  But you can specify
-them to be of any length and non-orthogonal to each other, so that
-they describe a tilted parallelepiped.  Via the <I>basis</I> keyword you
-add atoms, one at a time, to the unit cell.  Its arguments are
-fractional coordinates (0.0 <= x,y,z < 1.0), so that a value of 0.5
-means a position half-way across the unit cell in that dimension.
+list of basis atoms to put in the unit cell.  By default, a1 and a2
+and a3 are 3 orthogonal unit vectors (edges of a unit cube).  But you
+can specify them to be of any length and non-orthogonal to each other,
+so that they describe a tilted parallelepiped.  Via the <I>basis</I>
+keyword you add atoms, one at a time, to the unit cell.  Its arguments
+are fractional coordinates (0.0 <= x,y,z < 1.0), so that a value of
+0.5 means a position half-way across the unit cell in that dimension.
 </P>
 <HR>
 
diff --git a/doc/lattice.txt b/doc/lattice.txt
index c09ea8d92d..757925e4af 100644
--- a/doc/lattice.txt
+++ b/doc/lattice.txt
@@ -101,13 +101,13 @@ It has 2 basis atoms, one at the corner and one at the center of the
 rectangle.
 
 A lattice of style {custom} allows you to specify a1, a2, a3, and a
-list of basis atoms to put in the unit cell.  By default, a1,a2,a3 are
-3 orthogonal unit vectors (edges of a unit cube).  But you can specify
-them to be of any length and non-orthogonal to each other, so that
-they describe a tilted parallelepiped.  Via the {basis} keyword you
-add atoms, one at a time, to the unit cell.  Its arguments are
-fractional coordinates (0.0 <= x,y,z < 1.0), so that a value of 0.5
-means a position half-way across the unit cell in that dimension.
+list of basis atoms to put in the unit cell.  By default, a1 and a2
+and a3 are 3 orthogonal unit vectors (edges of a unit cube).  But you
+can specify them to be of any length and non-orthogonal to each other,
+so that they describe a tilted parallelepiped.  Via the {basis}
+keyword you add atoms, one at a time, to the unit cell.  Its arguments
+are fractional coordinates (0.0 <= x,y,z < 1.0), so that a value of
+0.5 means a position half-way across the unit cell in that dimension.
 
 :line