diff --git a/R/boundsPredprob.R b/R/boundsPredprob.R
index 23d34966..4ff0529e 100644
--- a/R/boundsPredprob.R
+++ b/R/boundsPredprob.R
@@ -17,7 +17,7 @@
 #' - `xU` : the minimal number of responses that meet the efficacy threshold.
 #' - `pU` : response rate corresponding to `xU`.
 #' - `predU` : predictive probability corresponding to `xU`
-#' - `postL`: posterior probability corresponding to `xU`.
+#' - `postU`: posterior probability corresponding to `xU`.
 #' - `LciU` : lower bound of one sided 95% CI for the response rate based on exact
 #'            binomial test.
 #'
diff --git a/man/boundsPredprob.Rd b/man/boundsPredprob.Rd
index 6fa7c081..bf9b1597 100644
--- a/man/boundsPredprob.Rd
+++ b/man/boundsPredprob.Rd
@@ -46,7 +46,7 @@ exact binomial test.
 \item \code{xU} : the minimal number of responses that meet the efficacy threshold.
 \item \code{pU} : response rate corresponding to \code{xU}.
 \item \code{predU} : predictive probability corresponding to \code{xU}
-\item \code{postL}: posterior probability corresponding to \code{xU}.
+\item \code{postU}: posterior probability corresponding to \code{xU}.
 \item \code{LciU} : lower bound of one sided 95\% CI for the response rate based on exact
 binomial test.
 }