diff --git a/plugins/samplesource/filesource/filesourcegui.cpp b/plugins/samplesource/filesource/filesourcegui.cpp
index 54a702895..0905baede 100644
--- a/plugins/samplesource/filesource/filesourcegui.cpp
+++ b/plugins/samplesource/filesource/filesourcegui.cpp
@@ -190,7 +190,7 @@ void FileSourceGui::on_showFileDialog_clicked(bool checked)
 
 void FileSourceGui::configureFileName()
 {
-	qDebug() << "FileSourceGui::configureFileName: " << m_fileName.toStdString();
+	qDebug() << "FileSourceGui::configureFileName: " << m_fileName.toStdString().c_str();
 	FileSourceInput::MsgConfigureFileSourceName* message = FileSourceInput::MsgConfigureFileSourceName::create(m_fileName);
 	message->submit(m_pluginAPI->getDSPEngineMessageQueue());
 }
diff --git a/plugins/samplesource/filesource/filesourceinput.cpp b/plugins/samplesource/filesource/filesourceinput.cpp
index 9d0770b39..2c54e653d 100644
--- a/plugins/samplesource/filesource/filesourceinput.cpp
+++ b/plugins/samplesource/filesource/filesourceinput.cpp
@@ -89,7 +89,7 @@ FileSourceInput::~FileSourceInput()
 
 void FileSourceInput::openFileStream()
 {
-	qDebug() << "FileSourceInput::openFileStream: " << m_fileName.toStdString();
+	qDebug() << "FileSourceInput::openFileStream: " << m_fileName.toStdString().c_str();
 
 	//stopInput();
 
@@ -257,7 +257,7 @@ bool FileSourceInput::applySettings(const GeneralSettings& generalSettings, cons
 		}
 
 		qDebug() << "FileSourceInput::applySettings:"
-				<< " file name: " << settings.m_fileName.toStdString()
+				<< " file name: " << settings.m_fileName.toStdString().c_str()
 				<< " center freq: " << m_centerFrequency << " Hz"
 				<< " sample rate: " << m_sampleRate
 				<< " Unix timestamp: " << m_startingTimeStamp;
diff --git a/sdrbase/dsp/filesink.cpp b/sdrbase/dsp/filesink.cpp
index c216e5579..726821d46 100644
--- a/sdrbase/dsp/filesink.cpp
+++ b/sdrbase/dsp/filesink.cpp
@@ -86,7 +86,7 @@ bool FileSink::handleMessage(Message* message)
         MsgConfigureFileSink* conf = (MsgConfigureFileSink*) message;
         handleConfigure(conf->getFileName(), conf->getSampleRate(), conf->getCenterFrequency());
         qDebug() << "FileSink::handleMessage:"
-        		<< " fileName: " << m_fileName
+        		<< " fileName: " << m_fileName.c_str()
 				<< " sampleRate: " << m_sampleRate
 				<< " centerFrequency: " << m_centerFrequency;
         message->completed();
diff --git a/sdrbase/mainwindow.cpp b/sdrbase/mainwindow.cpp
index 17d227167..89a3a6d5a 100644
--- a/sdrbase/mainwindow.cpp
+++ b/sdrbase/mainwindow.cpp
@@ -194,7 +194,7 @@ void MainWindow::loadSettings()
 
 void MainWindow::loadSettings(const Preset* preset)
 {
-	qDebug() << "MainWindow::loadSettings(preset): " << preset->getSource().toStdString();
+	qDebug() << "MainWindow::loadSettings(preset): " << preset->getSource().toStdString().c_str();
 
 	ui->glSpectrumGUI->deserialize(preset->getSpectrumConfig());
 	ui->dcOffset->setChecked(preset->getDCOffsetCorrection());
@@ -217,7 +217,7 @@ void MainWindow::saveSettings()
 
 void MainWindow::saveSettings(Preset* preset)
 {
-	qDebug() << "MainWindow::saveSettings(preset): " << preset->getSource().toStdString();
+	qDebug() << "MainWindow::saveSettings(preset): " << preset->getSource().toStdString().c_str();
 
 	preset->setSpectrumConfig(ui->glSpectrumGUI->serialize());
     preset->clearChannels();
diff --git a/sdrbase/plugin/pluginmanager.cpp b/sdrbase/plugin/pluginmanager.cpp
index 45b73a665..e489c0516 100644
--- a/sdrbase/plugin/pluginmanager.cpp
+++ b/sdrbase/plugin/pluginmanager.cpp
@@ -71,8 +71,8 @@ void PluginManager::removeChannelInstance(PluginGUI* pluginGUI)
 void PluginManager::registerSampleSource(const QString& sourceName, PluginInterface* plugin)
 {
 	qDebug() << "PluginManager::registerSampleSource "
-			<< plugin->getPluginDescriptor().displayedName.toStdString()
-			<< " with source name " << sourceName.toStdString();
+			<< plugin->getPluginDescriptor().displayedName.toStdString().c_str()
+			<< " with source name " << sourceName.toStdString().c_str();
 
 	m_sampleSourceRegistrations.append(SampleSourceRegistration(sourceName, plugin));
 }
@@ -123,7 +123,7 @@ void PluginManager::loadSettings(const Preset* preset)
 	renameChannelInstances();
 
 	if(m_sampleSourceInstance != NULL) {
-		qDebug() << "m_sampleSourceInstance->deserializeGeneral (" << m_sampleSourceInstance->getName().toStdString() << ")";
+		qDebug() << "m_sampleSourceInstance->deserializeGeneral (" << m_sampleSourceInstance->getName().toStdString().c_str() << ")";
 		m_sampleSourceInstance->deserializeGeneral(preset->getSourceGeneralConfig());
 		if(m_sampleSource == preset->getSource()) {
 			qDebug() << "m_sampleSourceInstance->deserialize";
@@ -243,14 +243,14 @@ int PluginManager::selectSampleSource(int index)
 		return -1;
 
 	m_sampleSource = m_sampleSourceDevices[index].m_sourceName;
-	qDebug() << "m_sampleSource at index " << index << " is " << m_sampleSource.toStdString();
+	qDebug() << "m_sampleSource at index " << index << " is " << m_sampleSource.toStdString().c_str();
 	m_sampleSourceInstance = m_sampleSourceDevices[index].m_plugin->createSampleSource(m_sampleSource, m_sampleSourceDevices[index].m_address);
 	return index;
 }
 
 int PluginManager::selectSampleSource(const QString& source)
 {
-	qDebug() << "PluginManager::selectSampleSource by name: " << source.toStdString();
+	qDebug() << "PluginManager::selectSampleSource by name: " << source.toStdString().c_str();
 
 	int index = -1;
 
@@ -280,7 +280,7 @@ int PluginManager::selectSampleSource(const QString& source)
 		return -1;
 
 	m_sampleSource = m_sampleSourceDevices[index].m_sourceName;
-	qDebug() << "m_sampleSource at index " << index << " is " << m_sampleSource.toStdString();
+	qDebug() << "m_sampleSource at index " << index << " is " << m_sampleSource.toStdString().c_str();
 	m_sampleSourceInstance = m_sampleSourceDevices[index].m_plugin->createSampleSource(m_sampleSource, m_sampleSourceDevices[index].m_address);
 	return index;
 }
diff --git a/sdrbase/settings/preset.cpp b/sdrbase/settings/preset.cpp
index 518751bc0..9ba2de228 100644
--- a/sdrbase/settings/preset.cpp
+++ b/sdrbase/settings/preset.cpp
@@ -27,7 +27,7 @@ void Preset::resetToDefaults()
 
 QByteArray Preset::serialize() const
 {
-	qDebug() << "Preset::serialize (" << this->getSource().toStdString()<< ")";
+	qDebug() << "Preset::serialize (" << this->getSource().toStdString().c_str() << ")";
 
 	SimpleSerializer s(1);
 	s.writeString(1, m_group);
@@ -45,7 +45,7 @@ QByteArray Preset::serialize() const
 
 	s.writeS32(200, m_channelConfigs.size());
 
-	qDebug() << "  m_group: " << m_group.toStdString();
+	qDebug() << "  m_group: " << m_group.toStdString().c_str();
 
 	for(int i = 0; i < m_channelConfigs.size(); i++) {
 		s.writeString(201 + i * 2, m_channelConfigs[i].m_channel);
@@ -57,7 +57,7 @@ QByteArray Preset::serialize() const
 
 bool Preset::deserialize(const QByteArray& data)
 {
-	qDebug() << "Preset::deserialize (" << this->getSource().toStdString() << ")";
+	qDebug() << "Preset::deserialize (" << this->getSource().toStdString().c_str() << ")";
 	SimpleDeserializer d(data);
 
 	if(!d.isValid()) {
@@ -79,7 +79,7 @@ bool Preset::deserialize(const QByteArray& data)
 		d.readBlob(11, &m_sourceGeneralConfig);
 		d.readBlob(12, &m_sourceConfig);
 
-		qDebug() << "  m_group: " << m_group.toStdString();
+		qDebug() << "  m_group: " << m_group.toStdString().c_str();
 
 		qint32 channelCount = 0;
 		d.readS32(200, &channelCount, 0);