diff --git a/R/phenotypeDiagnostics.R b/R/phenotypeDiagnostics.R
index 7dba0d1..6237e4f 100644
--- a/R/phenotypeDiagnostics.R
+++ b/R/phenotypeDiagnostics.R
@@ -5,7 +5,9 @@
 #' @param databaseDiagnostics If TRUE, database diagnostics will be run.
 #' @param codelistDiagnostics If TRUE, codelist diagnostics will be run.
 #' @param cohortDiagnostics If TRUE, cohort diagnostics will be run.
-#' @param populationDiagnostics description
+#' @param populationDiagnostics If TRUE, population diagnostics will be run.
+#' @param populationSample N of people from the cdm to sample. If NULL no
+#' sampling will be performed
 #' @param matchedDiagnostics If TRUE, cohort to population
 #' diagnostics will be run.
 #' @param nSample The number of people to take a random sample for matching to
diff --git a/man/phenotypeDiagnostics.Rd b/man/phenotypeDiagnostics.Rd
index dd376dc..8882df3 100644
--- a/man/phenotypeDiagnostics.Rd
+++ b/man/phenotypeDiagnostics.Rd
@@ -24,7 +24,10 @@ phenotypeDiagnostics(
 
 \item{cohortDiagnostics}{If TRUE, cohort diagnostics will be run.}
 
-\item{populationDiagnostics}{description}
+\item{populationDiagnostics}{If TRUE, population diagnostics will be run.}
+
+\item{populationSample}{N of people from the cdm to sample. If NULL no
+sampling will be performed}
 
 \item{matchedDiagnostics}{If TRUE, cohort to population
 diagnostics will be run.}