diff --git a/src/base/SegmentNotationHelper.h b/src/base/SegmentNotationHelper.h
index 1804a14..0823ee5 100644
--- a/src/base/SegmentNotationHelper.h
+++ b/src/base/SegmentNotationHelper.h
@@ -31,7 +31,7 @@ public:
     SegmentNotationHelper(Segment &t) : SegmentHelper(t) { }
     virtual ~SegmentNotationHelper();
 
-    SegmentHelper::segment;
+    using SegmentHelper::segment;
 
     /**
      * Set the NOTE_TYPE and NOTE_DOTS properties on the events
diff --git a/src/gui/editors/matrix/MatrixStaff.h b/src/gui/editors/matrix/MatrixStaff.h
index 2ce65a8..eec5802 100644
--- a/src/gui/editors/matrix/MatrixStaff.h
+++ b/src/gui/editors/matrix/MatrixStaff.h
@@ -79,7 +79,7 @@ protected:
     virtual ViewElement* makeViewElement(Event*);
 
 public:
-    LinedStaff::setResolution;
+    using LinedStaff::setResolution;
 
 //     double getTimeScaleFactor() const { return m_scaleFactor * 2; } // TODO: GROSS HACK to enhance matrix resolution (see also in matrixview.cpp) - BREAKS MATRIX VIEW, see bug 1000595
     double getTimeScaleFactor() const { return m_scaleFactor; }
diff --git a/src/gui/editors/notation/NotationStaff.h b/src/gui/editors/notation/NotationStaff.h
index 9660700..758f180 100644
--- a/src/gui/editors/notation/NotationStaff.h
+++ b/src/gui/editors/notation/NotationStaff.h
@@ -100,11 +100,11 @@ public:
         m_barNumbersEvery = barNumbersEvery;
     }
 
-    LinedStaff::setPageMode;
-    LinedStaff::setPageWidth;
-    LinedStaff::setRowsPerPage;
-    LinedStaff::setRowSpacing;
-    LinedStaff::setConnectingLineLength;
+    using LinedStaff::setPageMode;
+    using LinedStaff::setPageWidth;
+    using LinedStaff::setRowsPerPage;
+    using LinedStaff::setRowSpacing;
+    using LinedStaff::setConnectingLineLength;
 
     /**
      * Gets a read-only reference to the pixmap factory used by the
diff --git a/src/sound/AlsaDriver.cpp b/src/sound/AlsaDriver.cpp
index de42960..ad61892 100644
--- a/src/sound/AlsaDriver.cpp
+++ b/src/sound/AlsaDriver.cpp
@@ -2068,7 +2068,7 @@ AlsaDriver::resetPlayback(const RealTime &oldPosition, const RealTime &position)
         unsigned char locateDataArr[7] = {
                                              0x06,
                                              0x01,
-                                             0x60 + t_hrs,    // (30fps flag) + hh
+                                             (unsigned char)(0x60 + t_hrs),    // (30fps flag) + hh
                                              t_min, 	    // mm
                                              t_sec, 	    // ss
                                              t_frm, 	    // frames
@@ -2339,8 +2339,8 @@ AlsaDriver::processNotesOff(const RealTime &time, bool now, bool everything)
 	bool scheduled = (offTime > alsaTime) && !now;
 	if (!scheduled) offTime = RealTime::zeroTime;
 
-        snd_seq_real_time_t alsaOffTime = { offTime.sec,
-                                            offTime.nsec };
+        snd_seq_real_time_t alsaOffTime = { (unsigned int)offTime.sec,
+                                            (unsigned int)offTime.nsec };
 
 	snd_seq_ev_set_noteoff(&event,
 			       ev->getChannel(),
@@ -3032,7 +3032,7 @@ AlsaDriver::insertMTCFullFrame(RealTime time)
     m_mtcFrames = (unsigned)m_mtcEncodedTime.nsec / 40000000U;
 
     time = time + m_alsaPlayStartTime - m_playStartPosition;
-    snd_seq_real_time_t atime = { time.sec, time.nsec };
+    snd_seq_real_time_t atime = { (unsigned int)time.sec, (unsigned int)time.nsec };
 
     unsigned char data[10] =
         { MIDI_SYSTEM_EXCLUSIVE,
@@ -3137,7 +3137,7 @@ AlsaDriver::insertMTCTQFrames(RealTime sliceStart, RealTime sliceEnd)
         }
 
         RealTime scheduleTime = t + m_alsaPlayStartTime - m_playStartPosition;
-        snd_seq_real_time_t atime = { scheduleTime.sec, scheduleTime.nsec };
+        snd_seq_real_time_t atime = { (unsigned int)scheduleTime.sec, (unsigned int)scheduleTime.nsec };
 
         event.type = SND_SEQ_EVENT_QFRAME;
         event.data.control.value = c;
@@ -3500,7 +3500,7 @@ AlsaDriver::processMidiOut(const MappedComposition &mC,
 
         // Second and nanoseconds for ALSA
         //
-        snd_seq_real_time_t time = { outputTime.sec, outputTime.nsec };
+        snd_seq_real_time_t time = { (unsigned int)outputTime.sec, (unsigned int)outputTime.nsec };
 
         if (!isSoftSynth) {
 
@@ -5198,7 +5198,7 @@ AlsaDriver::sendSystemQueued(MidiByte command,
     snd_seq_ev_set_source(&event, m_syncOutputPort);
     snd_seq_ev_set_subs(&event);
 
-    snd_seq_real_time_t sendTime = { time.sec, time.nsec };
+    snd_seq_real_time_t sendTime = { (unsigned int)time.sec, (unsigned int)time.nsec };
 
     // Schedule the command
     //