diff --git a/doc/fix_viscosity.html b/doc/fix_viscosity.html
index be9de3737b..be01e99824 100644
--- a/doc/fix_viscosity.html
+++ b/doc/fix_viscosity.html
@@ -144,7 +144,8 @@ solvent particles.
 </P>
 <P><B>Related commands:</B>
 </P>
-<P><A HREF = "fix_ave_spatial.html">fix ave/spatial</A>
+<P><A HREF = "fix_ave_spatial.html">fix ave/spatial</A>, <A HREF = "fix_thermal_conductivity.html">fix
+thermal/conductivity</A>
 </P>
 <P><B>Default:</B>
 </P>
diff --git a/doc/fix_viscosity.txt b/doc/fix_viscosity.txt
index 0be053f698..33d82cad40 100644
--- a/doc/fix_viscosity.txt
+++ b/doc/fix_viscosity.txt
@@ -133,7 +133,8 @@ solvent particles.
 
 [Related commands:]
 
-"fix ave/spatial"_fix_ave_spatial.html
+"fix ave/spatial"_fix_ave_spatial.html, "fix
+thermal/conductivity"_fix_thermal_conductivity.html
 
 [Default:]