diff --git a/src/sequencer/RosegardenSequencerApp.cpp b/src/sequencer/RosegardenSequencerApp.cpp
index 6e20e69..9e9b301 100644
--- a/src/sequencer/RosegardenSequencerApp.cpp
+++ b/src/sequencer/RosegardenSequencerApp.cpp
@@ -1104,7 +1104,7 @@ RosegardenSequencerApp::getSoundDrivertqStatus(const TQString &guiVersion)
         drivertqStatus |= VERSION_OK;
     else {
         std::cerr << "WARNING: RosegardenSequencerApp::getSoundDriverStatus: "
-        << "GUI version \"" << guiVersion
+        << "GUI version \"" << guiVersion.ascii()
         << "\" does not match sequencer version \"" << VERSION
         << "\"" << std::endl;
     }
diff --git a/src/sequencer/SequencerMmapper.cpp b/src/sequencer/SequencerMmapper.cpp
index bc34642..f3808a1 100644
--- a/src/sequencer/SequencerMmapper.cpp
+++ b/src/sequencer/SequencerMmapper.cpp
@@ -123,14 +123,14 @@ SequencerMmapper::setFileSize(size_t size)
     // (seek() to wanted size, then write a byte)
     //
     if (::lseek(m_fd, size - 1, SEEK_SET) == -1) {
-        std::cerr << "WARNING: SequencerMmapper : Couldn't lseek in " << m_fileName
+        std::cerr << "WARNING: SequencerMmapper : Couldn't lseek in " << m_fileName.ascii()
         << " to " << size << std::endl;
         throw Exception("lseek failed");
     }
 
     if (::write(m_fd, "\0", 1) != 1) {
         std::cerr << "WARNING: SequencerMmapper : Couldn't write byte in  "
-        << m_fileName << std::endl;
+        << m_fileName.ascii() << std::endl;
         throw Exception("write failed");
     }
 }
diff --git a/src/sound/AlsaDriver.cpp b/src/sound/AlsaDriver.cpp
index a0ac79c..921b17f 100644
--- a/src/sound/AlsaDriver.cpp
+++ b/src/sound/AlsaDriver.cpp
@@ -982,7 +982,7 @@ AlsaDriver::createMidiDevice(AlsaPortDescription *port,
 
         int outputPort = checkAlsaError(snd_seq_create_simple_port
                                         (m_midiHandle,
-                                         portName,
+                                         portName.ascii(),
                                          SND_SEQ_PORT_CAP_READ |
                                          SND_SEQ_PORT_CAP_SUBS_READ,
                                          SND_SEQ_PORT_TYPE_APPLICATION),
@@ -990,7 +990,7 @@ AlsaDriver::createMidiDevice(AlsaPortDescription *port,
 
         if (outputPort >= 0) {
 
-            std::cerr << "CREATED OUTPUT PORT " << outputPort << ":" << portName << " for device " << deviceId << std::endl;
+            std::cerr << "CREATED OUTPUT PORT " << outputPort << ":" << portName.ascii() << " for device " << deviceId << std::endl;
 
             m_outputPorts[deviceId] = outputPort;
 
@@ -1179,7 +1179,7 @@ AlsaDriver::renameDevice(DeviceId id, TQString name)
         }
     }
 
-    std::cerr << "Renamed " << m_client << ":" << i->second << " to " << name << std::endl;
+    std::cerr << "Renamed " << m_client << ":" << i->second << " to " << name.ascii() << std::endl;
 }
 
 ClientPortPair
@@ -1252,7 +1252,7 @@ void
 AlsaDriver::setConnectionToDevice(MappedDevice &device, TQString connection)
 {
     ClientPortPair pair( -1, -1);
-    if (connection && connection != "") {
+    if (!connection.isNull() && connection != "") {
         pair = getPortByName(connection.ascii());
     }
     setConnectionToDevice(device, connection, pair);
@@ -1352,7 +1352,7 @@ AlsaDriver::setPlausibleConnection(DeviceId id, TQString idealConnection)
     ClientPortPair port(getPortByName(idealConnection.ascii()));
 
     audit << "AlsaDriver::setPlausibleConnection: connection like "
-    << idealConnection << " requested for device " << id << std::endl;
+    << idealConnection.ascii() << " requested for device " << id << std::endl;
 
     if (port.first != -1 && port.second != -1) {
 
@@ -1610,7 +1610,7 @@ AlsaDriver::setCurrentTimer(TQString timer)
     if (timer == getCurrentTimer())
         return ;
 
-    std::cerr << "AlsaDriver::setCurrentTimer(" << timer << ")" << std::endl;
+    std::cerr << "AlsaDriver::setCurrentTimer(" << timer.ascii() << ")" << std::endl;
 
     std::string name(timer.ascii());