diff --git a/messageviewer/src/dkim-verify/dkimchecksignaturejob.cpp b/messageviewer/src/dkim-verify/dkimchecksignaturejob.cpp
--- a/messageviewer/src/dkim-verify/dkimchecksignaturejob.cpp
+++ b/messageviewer/src/dkim-verify/dkimchecksignaturejob.cpp
@@ -28,7 +28,7 @@
 #include <QDateTime>
 #include <QCryptographicHash>
 #include <QFile>
-#include <Qca-qt5/QtCrypto/qca_publickey.h>
+#include <qca_publickey.h>
 //see https://tools.ietf.org/html/rfc6376
 //#define DEBUG_SIGNATURE_DKIM 1
 using namespace MessageViewer;