diff --git a/doc/source/diagnostic_codes/thermal_equation.rst b/doc/source/diagnostic_codes/thermal_equation.rst
index 18a5096c..82485772 100644
--- a/doc/source/diagnostic_codes/thermal_equation.rst
+++ b/doc/source/diagnostic_codes/thermal_equation.rst
@@ -35,7 +35,7 @@ Thermal Energy Equation
  :math:`c_6\frac{\mathrm{f}_1\mathrm{f}_4\mathrm{f}_5}{r^2\mathrm{sin^2}\theta}\frac{\partial^2 \Theta'}{\partial \phi^2}`                                                                                                                                                           1431    sp\_diff\_phi 
  :math:`c_6\frac{\mathrm{f}_1\mathrm{f}_4\mathrm{f}_5}{r^2\mathrm{sin^2}\theta}\frac{\partial^2 \overline{\Theta}}{\partial \phi^2}`                                                                                                                                                 1432    sm\_diff\_phi 
  :math:`F_Q(r)`                                                                                                                                                                                                                                                                      1433    vol\_heat\_flux 
- :math:`\mathrm{f}_6(r)`                                                                                                                                                                                                                                                             1434    vol\_heating   
+ :math:`c_{10}\mathrm{f}_6(r)`                                                                                                                                                                                                                                                             1434    vol\_heating   
  :math:`c_5\Phi(r,\theta,\phi)`                                                                                                                                                                                                                                                      1435    visc\_heating 
  :math:`\mathrm{f}_7c_4\left( {\boldsymbol{\mathcal{J}}}\cdot{\boldsymbol{\mathcal{J}}} \right)`                                                                                                                                                                                     1436    ohmic\_heat    
  :math:`\mathrm{f}_7c_4\left( {\boldsymbol{\mathcal{J}'}}\cdot{\boldsymbol{\mathcal{J}'}} \right)`                                                                                                                                                                                   1437    ohmic\_heat\_pp