diff --git a/part/pageviewannotator.cpp b/part/pageviewannotator.cpp
index 2794b0df6..a33d8f9e6 100644
--- a/part/pageviewannotator.cpp
+++ b/part/pageviewannotator.cpp
@@ -334,7 +334,7 @@ class PickPointEngine2 : public PickPointEngine
             Okular::Annotation * ann = nullptr;
 
             Okular::CertificateStore* certStore = m_document->getCertStore();
-            QList<Okular::CertificateInfo*> certs = certStore->getSigningCertificates();
+            const QList<Okular::CertificateInfo*>& certs = certStore->getSigningCertificates();
 
             QStringList items;
             for( auto cert : certs )
@@ -899,8 +899,8 @@ QRect PageViewAnnotator::performRouteMouseOrTabletEvent(const AnnotatorEngine::E
 
     if (signatureMode() && eventType == AnnotatorEngine::Press) {
         QDomElement elem;
-        elem.setTagName("engine");
-        elem.setAttribute("block", 1);
+        elem.setTagName(QStringLiteral("engine"));
+        elem.setAttribute(QStringLiteral("block"), 1);
         m_engine = new PickPointEngine2(elem, m_document);
     }