diff --git a/R/mean.variance.GMM.gradient.R b/R/mean.variance.GMM.gradient.R
index 5d83fef..09f7ac5 100644
--- a/R/mean.variance.GMM.gradient.R
+++ b/R/mean.variance.GMM.gradient.R
@@ -10,6 +10,8 @@
 #'
 #' Derivative of the moment conditions according to the vector of parameters
 #' @param param GAL parameters
+#' @param Data Data sample
+#' @param type Choose between "mu" or "kappa" parametrization
 #' @return gradient matrix
 #'
 #' @author François Pelletier
diff --git a/R/startparamGAL.R b/R/startparamGAL.R
index 6768ca6..a0c9551 100644
--- a/R/startparamGAL.R
+++ b/R/startparamGAL.R
@@ -26,12 +26,12 @@ startparamGAL <- function(data,type="mu",log=FALSE)
 		mu <- mom[3]*sigma*sqrt(2/(3*(mom[4])))
 		theta <- mom[1]-tau*mu
 		if(log==FALSE)
-			c(theta,sigma,mu,tau)
+			return(c(theta,sigma,mu,tau))
 		else
-			log(c(theta,sigma,mu,tau))
+			return(log(c(theta,sigma,mu,tau)))
 	}
 	if(type=="kappa")
 	{
-		changetypeGAL(startparamGAL(data,type="mu",log),type="kappa",target="mu",log)
+		return(changetypeGAL(startparamGAL(data,type="mu",log),type="kappa",target="mu",log))
 	}
 }
diff --git a/man/mean.variance.GMM.gradient.Rd b/man/mean.variance.GMM.gradient.Rd
index 84ba393..4321694 100644
--- a/man/mean.variance.GMM.gradient.Rd
+++ b/man/mean.variance.GMM.gradient.Rd
@@ -6,6 +6,11 @@
 }
 \arguments{
   \item{param}{GAL parameters}
+
+  \item{Data}{Data sample}
+
+  \item{type}{Choose between "mu" or "kappa"
+  parametrization}
 }
 \value{
 gradient matrix