diff --git a/ParameterLib/FunctionParameter.h b/ParameterLib/FunctionParameter.h
index 69d1e0c9428d341a206939bb1d53773123ee9458..f05c35d1b11f5d840d159dbb834860e6b139a317 100644
--- a/ParameterLib/FunctionParameter.h
+++ b/ParameterLib/FunctionParameter.h
@@ -55,6 +55,7 @@ struct FunctionParameter final : public Parameter<T>
      *
      * @param name        the parameter's name
      * @param vec_expression_str  a vector of mathematical expressions
+     * @param curves      named list of curves used by expressions.
      * The vector size specifies the number of components of the parameter.
      */
     FunctionParameter(