diff --git a/doc/kspace_modify.html b/doc/kspace_modify.html
index f88f28af01..ae0882b77f 100644
--- a/doc/kspace_modify.html
+++ b/doc/kspace_modify.html
@@ -226,8 +226,8 @@ option.  Support for those PPPM variants will be added later.
 </P>
 <P>The <I>kmax/ewald</I> keyword sets the number of kspace vectors in
 each dimension for kspace style <I>ewald</I>.  The three values must
-be positive integers. Values for kx,ky,kz of
-0,0,0 unset the option. When this option is not 
+be positive integers, or else (0,0,0), which unsets the option. 
+When this option is not 
 set, the Ewald sum scheme chooses its own kspace vectors, 
 consistent with the
 user-specified accuracy and pairwise cutoff. In any case,
diff --git a/doc/kspace_modify.txt b/doc/kspace_modify.txt
index bf97e1c66d..52ed127570 100644
--- a/doc/kspace_modify.txt
+++ b/doc/kspace_modify.txt
@@ -220,8 +220,8 @@ option.  Support for those PPPM variants will be added later.
 
 The {kmax/ewald} keyword sets the number of kspace vectors in
 each dimension for kspace style {ewald}.  The three values must
-be positive integers. Values for kx,ky,kz of
-0,0,0 unset the option. When this option is not 
+be positive integers, or else (0,0,0), which unsets the option. 
+When this option is not 
 set, the Ewald sum scheme chooses its own kspace vectors, 
 consistent with the
 user-specified accuracy and pairwise cutoff. In any case,