diff --git a/doc/user-manual/fpakc_UserManual.tex b/doc/user-manual/fpakc_UserManual.tex
index c43fb65..4b8ba6e 100644
--- a/doc/user-manual/fpakc_UserManual.tex
+++ b/doc/user-manual/fpakc_UserManual.tex
@@ -619,7 +619,7 @@ make
                   Required values are:
                                    
                   \textbf{potential}: Real.
-                  Potential for Dirichlet boundary condition.
+                    Potential for Dirichlet boundary condition.
                    
                   \textbf{temporalProfile}: Character.
                     Filename of the 2 column file containing the time variable profile.
@@ -627,6 +627,12 @@ make
                     The first column is the time in $\unit{s}$.
                     The second column is the factor that will multiply the value set in \textbf{potential}.
                     
+                 \item \textbf{neumann}: Constant value of the electric field normal to the surface.
+                   Required fields are:
+                   
+                   \textbf{electricField}: Real.
+                     Value of the electric field constant to the surface.
+                    
                  \item \textbf{floating}: The potential is adjusted over time to maintain a zero current on the surface, \textit{i. e.}, the surface is \textit{floating}.                                   
                    \textbf{potential}: Real.
                      Initial potential of the surface.