diff --git a/NAMESPACE b/NAMESPACE
index a649c15..340e413 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -15,6 +15,7 @@ export(distribution.point_mass)
 export(distribution.poisson)
 export(distribution.uniform)
 export(estimate_mixture_of_two_normals)
+export(is.distribution)
 export(logistic)
 export(logit)
 export(plot_posterior)
diff --git a/R/distribution_R6_class.R b/R/distribution_R6_class.R
index 40d5c47..6fc997f 100644
--- a/R/distribution_R6_class.R
+++ b/R/distribution_R6_class.R
@@ -237,14 +237,15 @@ distribution.abstract.class <- R6.class(
 ################################################################################/
 # is.distribution
 ################################################################################/
-#' @title Distribution Classes
+#' is.distribution
 #'
-#' @description Available distributions implemented in `mastiff`.
+#' Checks whether an object `x` is a R6 distribution class implemented by
+#' [mastiff][Mastiff-Distributions], i.e. inherits either
+#' [distribution.discrete.class] or [distribution.continuous.class]
 #'
 #' @param x An R object.
 #' 
-#' `is.distribution( x )` checks where an object `x` inherits from either
-#' [distribution.discrete.class] or [distribution.continuous.class]
-#' 
-#' `mastiff`
+#' @seealso [Mastiff-Distributions]
+#' @export
+
 is.distribution <- function( x ) inherits( x, 'distribution.abstract.class' )
\ No newline at end of file
diff --git a/man/is.distribution.Rd b/man/is.distribution.Rd
index 5aed075..a1243b9 100644
--- a/man/is.distribution.Rd
+++ b/man/is.distribution.Rd
@@ -2,18 +2,18 @@
 % Please edit documentation in R/distribution_R6_class.R
 \name{is.distribution}
 \alias{is.distribution}
-\title{Distribution Classes}
+\title{is.distribution}
 \usage{
 is.distribution(x)
 }
 \arguments{
-\item{x}{An R object.
-
-\code{is.distribution( x )} checks where an object \code{x} inherits from either
-\link{distribution.discrete.class} or \link{distribution.continuous.class}
-
-\code{mastiff}}
+\item{x}{An R object.}
 }
 \description{
-Available distributions implemented in \code{mastiff}.
+Checks whether an object \code{x} is a R6 distribution class implemented by
+\link[=Mastiff-Distributions]{mastiff}, i.e. inherits either
+\link{distribution.discrete.class} or \link{distribution.continuous.class}
+}
+\seealso{
+\link{Mastiff-Distributions}
 }