diff --git a/PopupCertifyUserId.cpp b/PopupCertifyUserId.cpp
index 3f5f6ae..e5933a5 100644
--- a/PopupCertifyUserId.cpp
+++ b/PopupCertifyUserId.cpp
@@ -69,8 +69,10 @@ void PopupCertifyUserId::Create(vector<WString>& privateKeys,
     WText * lblOptions = new WText(TR("Options"));
     vblOptions->addWidget(unique_ptr<WText> (lblOptions));
     m_cbOptionExportable = new WCheckBox(TR("ExportableCertification"));
+    m_cbOptionExportable->setToolTip(TR("OneWayHint"));
     vblOptions->addWidget(unique_ptr<WCheckBox> (m_cbOptionExportable));
     m_cbOptionNonRevocable = new WCheckBox(TR("NonRevocableCertification"));
+    m_cbOptionNonRevocable->setToolTip(TR("OneWayHint"));
     vblOptions->addWidget(unique_ptr<WCheckBox> (m_cbOptionNonRevocable));
     /*m_cbOptionTrust = new WCheckBox(TR("TrustCertification"));
     vblOptions->addWidget(unique_ptr<WCheckBox> (m_cbOptionTrust));*/
diff --git a/WTAPPROOT/K7/K7.xml b/WTAPPROOT/K7/K7.xml
index e2c8348..b8b2d6c 100644
--- a/WTAPPROOT/K7/K7.xml
+++ b/WTAPPROOT/K7/K7.xml
@@ -80,6 +80,7 @@
     <message id='Apply'>Apply</message>
     <message id='CertificationSuccess'>Key succesfully certified</message>
     <message id='CertificationFailure'>Key certification failed</message>
+    <message id='OneWayHint'>Once set, this option cannot be removed. Use gpg cli for further edit.</message>
     
     <message id='PrepareCopy'>Click to be able to copy next</message>
     
diff --git a/WTAPPROOT/K7/K7_fr.xml b/WTAPPROOT/K7/K7_fr.xml
index ae48ee0..e745945 100644
--- a/WTAPPROOT/K7/K7_fr.xml
+++ b/WTAPPROOT/K7/K7_fr.xml
@@ -80,6 +80,7 @@
     <message id='Apply'>Appliquer</message>
     <message id='CertificationSuccess'>Succès de certification de la clé</message>
     <message id='CertificationFailure'>Échec de certification de la clé</message>
+    <message id='OneWayHint'>Une fois appliquée, cette option ne pourra plus être enlevée. Utilisez gpg en ligne de commande pour édition ultérieure.</message>
     
     <message id='PrepareCopy'>Cliquez pour pouvoir ensuite copier</message>