diff --git a/src/abstractreader.cpp b/src/abstractreader.cpp
--- a/src/abstractreader.cpp
+++ b/src/abstractreader.cpp
@@ -41,13 +41,11 @@ void AbstractReader::enable(bool enabled
 {
     if (enabled)
     {
-        firstReadAfterEnable = true;
         QObject::connect(_device, &QIODevice::readyRead,
                          this, &AbstractReader::onDataReady);
     }
     else
     {
-        firstReadAfterEnable = false;
         QObject::disconnect(_device, 0, this, 0);
         disconnectSinks();
     }
diff --git a/src/abstractreader.h b/src/abstractreader.h
--- a/src/abstractreader.h
+++ b/src/abstractreader.h
@@ -44,7 +44,7 @@ public:
 
     /// Reader should only read when enabled. Default state should be
     /// 'disabled'.
-    void enable(bool enabled = true);
+    virtual void enable(bool enabled = true);
 
     /// None of the current readers support X channel at the moment
     bool hasX() const final { return false; };
@@ -68,7 +68,6 @@ protected:
     QIODevice* _device;
     bool paused;
     unsigned _numChannels;
-    bool firstReadAfterEnable = false;
 
 protected slots:
     /// all derived readers has to override this function
diff --git a/src/asciireader.cpp b/src/asciireader.cpp
--- a/src/asciireader.cpp
+++ b/src/asciireader.cpp
@@ -58,6 +58,22 @@ QWidget* AsciiReader::settingsWidget()
     return &_settingsWidget;
 }
 
+void AsciiReader::enable(bool enabled)
+{
+    if (enabled)
+    {
+        firstReadAfterEnable = true;
+        QObject::connect(_device, &QIODevice::readyRead,
+                         this, &AsciiReader::onDataReady);
+    }
+    else
+    {
+        firstReadAfterEnable = false;
+        QObject::disconnect(_device, 0, this, 0);
+        disconnectSinks();
+    }
+}
+
 void AsciiReader::onDataReady()
 {
     while(_device->canReadLine())
diff --git a/src/asciireader.h b/src/asciireader.h
--- a/src/asciireader.h
+++ b/src/asciireader.h
@@ -32,6 +32,7 @@ class AsciiReader : public AbstractReade
 public:
     explicit AsciiReader(QIODevice* device, QObject *parent = 0);
     QWidget* settingsWidget();
+    void enable(bool enabled);
     /// Stores settings into a `QSettings`
     void saveSettings(QSettings* settings);
     /// Loads settings from a `QSettings`.
@@ -43,6 +44,8 @@ private:
     unsigned autoNumOfChannels;
     QChar delimiter; ///< selected column delimiter
 
+    bool firstReadAfterEnable = false;
+
 private slots:
     void onDataReady() override;
 };