diff --git a/srcpkgs/lightdm/template b/srcpkgs/lightdm/template
index 3f845663c2e385..f990bfee8c2cb6 100644
--- a/srcpkgs/lightdm/template
+++ b/srcpkgs/lightdm/template
@@ -43,6 +43,15 @@ post_install() {
 	done
 	sed 's|\#session-wrapper=.*|session-wrapper=/etc/lightdm/Xsession|' -i ${DESTDIR}/etc/lightdm/lightdm.conf
 	sed "s|pam_systemd\.so|pam_elogind.so|" -i ${DESTDIR}/etc/pam.d/*
+
+	# Deduplicazione di pam_elogind.so nei file PAM di LightDM
+	for pam_file in lightdm lightdm-greeter lightdm-autologin; do
+		if [ -f "${DESTDIR}/etc/pam.d/${pam_file}" ]; then
+			awk '/pam_elogind\.so/ {if (!seen) {print; seen=1}; next} {print}' \
+				"${DESTDIR}/etc/pam.d/${pam_file}" > "${DESTDIR}/etc/pam.d/${pam_file}.tmp" && \
+			mv "${DESTDIR}/etc/pam.d/${pam_file}.tmp" "${DESTDIR}/etc/pam.d/${pam_file}"
+		fi
+	done
 }
 
 liblightdm-gobject_package() {