diff --git a/logdoctor/main.cpp b/logdoctor/main.cpp
index 35fb76a9..137393ed 100644
--- a/logdoctor/main.cpp
+++ b/logdoctor/main.cpp
@@ -6,6 +6,8 @@
 
 int main(int argc, char *argv[])
 {
+    qRegisterMetaType<size_t>("size_t");
+
     QApplication::setAttribute( Qt::AA_EnableHighDpiScaling );
     QApplication a(argc, argv);