diff --git a/man/estparnormratio.Rd b/man/estparnormratio.Rd
index 71286fb276a8b6ed4f950f955014f9abf225eb41..eea63a1fb8e9956a149f2932c1bed2c5db3db612 100644
--- a/man/estparnormratio.Rd
+++ b/man/estparnormratio.Rd
@@ -31,7 +31,7 @@ according to Gaussian distributions,
 using the EM (estimation-maximization) algorithm.
 }
 \details{
-The parameters \eqn{\beta}, \eqn{\rho}, \eqn{delta_y} are estimated with the EM algorithm
+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.