diff --git a/doc/user-manual/fpakc_UserManual.tex b/doc/user-manual/fpakc_UserManual.tex
index bba9e4a..11e2b08 100644
--- a/doc/user-manual/fpakc_UserManual.tex
+++ b/doc/user-manual/fpakc_UserManual.tex
@@ -588,7 +588,7 @@ make
                 \textbf{incident}: Character.
                   Name of the incident species that will be reflected.
                     
-              \item \textbf{outflowAdaptive}: Changes the reflection velocity of the species defined by the \textbf{incident} to maintain it equal to the mean velocity of the others in the case.
+              \item \textbf{outflowAdaptive}: Changes the velocity of the reflected particles in the species defined by the \textbf{incident} parameter to maintain it equal to the mean velocity of the others in the case.
               The required input is:
                 
                 \textbf{incident}: Character.