diff --git a/doc/user-manual/fpakc_UserManual.tex b/doc/user-manual/fpakc_UserManual.tex
index 5368d1c..c43fb65 100644
--- a/doc/user-manual/fpakc_UserManual.tex
+++ b/doc/user-manual/fpakc_UserManual.tex
@@ -629,7 +629,8 @@ make
                     
                  \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.
-                     Potential for Dirichlet boundary condition.
+                     Initial potential of the surface.
+                     The initial charge value for the simulation will be calculated by the potential times the capacitance.
                    
                    \textbf{capacitance}: Real.
                      Capacitance of the surface in Farads.