diff --git a/src/core/atcore.cpp b/src/core/atcore.cpp
--- a/src/core/atcore.cpp
+++ b/src/core/atcore.cpp
@@ -406,8 +406,8 @@
 {
     if (state != d->printerState) {
         qCDebug(ATCORE_CORE) << QStringLiteral("Atcore state changed from [%1] to [%2]")
-                             .arg(QVariant::fromValue(d->printerState).value<QString>())
-                             .arg(QVariant::fromValue(state).value<QString>());
+                             .arg(QVariant::fromValue(d->printerState).value<QString>(),
+                                  QVariant::fromValue(state).value<QString>());
         d->printerState = state;
         if (state == AtCore::FINISHEDPRINT && d->sdCardPrinting) {
             //Clean up the sd card print
diff --git a/src/core/printthread.cpp b/src/core/printthread.cpp
--- a/src/core/printthread.cpp
+++ b/src/core/printthread.cpp
@@ -176,8 +176,8 @@
     }
     if (newState != d->state) {
         qCDebug(PRINT_THREAD) << QStringLiteral("State changed from [%1] to [%2]")
-                              .arg(QVariant::fromValue(d->state).value<QString>())
-                              .arg(QVariant::fromValue(newState).value<QString>());
+                              .arg(QVariant::fromValue(d->state).value<QString>(),
+                                   QVariant::fromValue(newState).value<QString>());
         disconnect(d->core, &AtCore::stateChanged, this, &PrintThread::setState);
         d->state = newState;
         emit(stateChanged(d->state));
diff --git a/testclient/mainwindow.cpp b/testclient/mainwindow.cpp
--- a/testclient/mainwindow.cpp
+++ b/testclient/mainwindow.cpp
@@ -385,9 +385,9 @@
         break;
     }
 
-    msg.append(QString::fromLatin1("[%1] : %2"));
-    msg = msg.arg(QString::number(number))
-          .arg(QString::number(temp));
+    msg.append(QString::fromLatin1("[%1] : %2").arg(
+                   QString::number(number), QString::number(temp)
+               ));
 
     logWidget->appendLog(msg);
 }