diff --git a/doc/fix_nh.html b/doc/fix_nh.html
index af1f0bb1bc..1fa07e3c14 100644
--- a/doc/fix_nh.html
+++ b/doc/fix_nh.html
@@ -36,7 +36,7 @@ keyword = <I>temp</I> or <I>iso</I> or <I>aniso</I> or <I>tri</I> or <I>x</I> or
     Pdamp = stress damping parameter (time units)
   <I>couple</I> = <I>none</I> or <I>xyz</I> or <I>xy</I> or <I>yz</I> or <I>xz</I>
   <I>tchain</I> value = length of thermostat chain (1 = single thermostat)
-  <I>pchain</I> values = length of thermostat chain  on barostat (0 = no thermostat)
+  <I>pchain</I> values = length of thermostat chain on barostat (0 = no thermostat)
   <I>mtk</I> value = <I>yes</I> or <I>no</I> = add in MTK adjustment term or not
   <I>tloop</I> value = number of sub-cycles to perform on thermostat
   <I>ploop</I> value = number of sub-cycles to perform on barostat thermostat
diff --git a/doc/fix_nh.txt b/doc/fix_nh.txt
index 1c323f323d..20532b21f5 100644
--- a/doc/fix_nh.txt
+++ b/doc/fix_nh.txt
@@ -29,7 +29,7 @@ keyword = {temp} or {iso} or {aniso} or {tri} or {x} or {y} or {z} or {xy} or {y
     Pdamp = stress damping parameter (time units)
   {couple} = {none} or {xyz} or {xy} or {yz} or {xz}
   {tchain} value = length of thermostat chain (1 = single thermostat)
-  {pchain} values = length of thermostat chain  on barostat (0 = no thermostat)
+  {pchain} values = length of thermostat chain on barostat (0 = no thermostat)
   {mtk} value = {yes} or {no} = add in MTK adjustment term or not
   {tloop} value = number of sub-cycles to perform on thermostat
   {ploop} value = number of sub-cycles to perform on barostat thermostat