diff --git a/doc/fix_press_berendsen.html b/doc/fix_press_berendsen.html
index 3f59e51cff..e86d9be9af 100644
--- a/doc/fix_press_berendsen.html
+++ b/doc/fix_press_berendsen.html
@@ -204,9 +204,7 @@ various <A HREF = "Section_howto.html#4_15">output commands</A>.
 </P>
 <P><B>Restrictions:</B>
 </P>
-<P>Any dimension being adjusted by this fix must be periodic.  A
-dimension whose target pressures are specified as NULL can be
-non-periodic or periodic.
+<P>Any dimension being adjusted by this fix must be periodic.
 </P>
 <P><B>Related commands:</B>
 </P>
diff --git a/doc/fix_press_berendsen.txt b/doc/fix_press_berendsen.txt
index 696b89cce7..b3dbf3ea7e 100644
--- a/doc/fix_press_berendsen.txt
+++ b/doc/fix_press_berendsen.txt
@@ -198,9 +198,7 @@ This fix is not invoked during "energy minimization"_minimize.html.
 
 [Restrictions:]
 
-Any dimension being adjusted by this fix must be periodic.  A
-dimension whose target pressures are specified as NULL can be
-non-periodic or periodic.
+Any dimension being adjusted by this fix must be periodic.
 
 [Related commands:]