diff --git a/R/estparnormratio.R b/R/estparnormratio.R
index 20b189b2f9506f2ac733805248673aca85c2de17..230eb5939fc37bcf796245fe4e2c3e3cbcbb0407 100644
--- a/R/estparnormratio.R
+++ b/R/estparnormratio.R
@@ -23,7 +23,7 @@ estparnormratio <- function(z, eps = 1e-06) {
   #' }
   #' with two attributes \code{attr(, "epsilon")} (precision of the result) and \code{attr(, "k")} (number of iterations).
   #'
-  #' @details The parameters \eqn{\beta}, \eqn{\rho}, \eqn{delta_y} are estimated with the EM algorithm
+  #' @details The parameters \eqn{\beta}, \eqn{\rho}, \eqn{\delta_y} are estimated with the EM algorithm
   #' as presented in El Ghaziri et al. The computation uses the \code{\link{kummerM}} function.
   #' This uses an iterative algorithm.
   #'