diff --git a/plugins/samplesource/filesource/filesourcegui.cpp b/plugins/samplesource/filesource/filesourcegui.cpp
index 34a18fc0b..e5abe9a2e 100644
--- a/plugins/samplesource/filesource/filesourcegui.cpp
+++ b/plugins/samplesource/filesource/filesourcegui.cpp
@@ -311,8 +311,7 @@ void FileSourceGui::updateWithAcquisition()
 void FileSourceGui::updateWithStreamData()
 {
 	ui->centerFrequency->setValue(m_centerFrequency/1000);
-	QString s = QString::number(m_sampleRate/1000.0, 'f', 0);
-	ui->sampleRateText->setText(tr("%1k").arg(s));
+	ui->sampleRateText->setText(tr("%1k").arg((float)m_sampleRate / 1000));
 	ui->play->setEnabled(m_acquisition);
 	QTime recordLength(0, 0, 0, 0);
 	recordLength = recordLength.addSecs(m_recordLength);
diff --git a/plugins/samplesource/filesource/filesourcethread.cpp b/plugins/samplesource/filesource/filesourcethread.cpp
index db4e6ea8f..0d4aa3e88 100644
--- a/plugins/samplesource/filesource/filesourcethread.cpp
+++ b/plugins/samplesource/filesource/filesourcethread.cpp
@@ -150,7 +150,7 @@ void FileSourceThread::tick()
         if (throttlems != m_throttlems)
         {
             m_throttlems = throttlems;
-            m_chunksize = (m_samplerate * 4 * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
+            m_chunksize = 4 * ((m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000);
             m_throttleToggle = !m_throttleToggle;
             setBuffer(m_chunksize);
         }