diff --git a/Detector.cpp b/Detector.cpp
index 5125775db..37370929c 100644
--- a/Detector.cpp
+++ b/Detector.cpp
@@ -24,6 +24,7 @@ Detector::Detector (unsigned frameRate, unsigned periodLengthInSeconds,
               new short [framesPerSignal * downSampleFactor] : 0)
   , m_bufferPos (0)
 {
+  (void)m_frameRate;            // quell compiler warning
   clear ();
 }
 
diff --git a/lib/init_rs.c b/lib/init_rs.c
index eb2711949..b836c1c53 100644
--- a/lib/init_rs.c
+++ b/lib/init_rs.c
@@ -38,7 +38,7 @@ void *INIT_RS(int symsize,int gfpoly,int fcr,int prim,
   int i, j, sr,root,iprim;
 
   /* Check parameter ranges */
-  if(symsize < 0 || symsize > 8*sizeof(DTYPE))
+  if(symsize < 0 || symsize > (int)(8*sizeof(DTYPE)))
     return NULL; /* Need version with ints rather than chars */
 
   if(fcr < 0 || fcr >= (1<<symsize))
diff --git a/lib/moondop.f90 b/lib/moondop.f90
index e2987d7f5..210565866 100644
--- a/lib/moondop.f90
+++ b/lib/moondop.f90
@@ -18,9 +18,8 @@ subroutine MoonDop(nyear,month,nday,uth4,lon4,lat4,RAMoon4,        &
   real*8 RME(6)                  !Vector from Earth center to Moon
   real*8 RAE(6)                  !Vector from Earth center to Obs
   real*8 RMA(6)                  !Vector from Obs to Moon
-  real*8 pvsun(6)
   real*8 rme0(6)
-  logical km,bary
+  logical km
 
   data rad/57.2957795130823d0/,twopi/6.28310530717959d0/
   
diff --git a/lib/tm2.f90 b/lib/tm2.f90
index 9d7777750..cf1107836 100644
--- a/lib/tm2.f90
+++ b/lib/tm2.f90
@@ -3,7 +3,7 @@ subroutine tm2(day,xlat4,xlon4,xl4,b4)
   implicit real*8 (a-h,o-z)
   parameter (RADS=0.0174532925199433d0)
 
-  real*4 day4,xlat4,xlon4,xl4,b4
+  real*4 xlat4,xlon4,xl4,b4
 
   glat=xlat4*RADS
   glong=xlon4*RADS
diff --git a/signalmeter.h b/signalmeter.h
index c5e21d61d..30badc5df 100644
--- a/signalmeter.h
+++ b/signalmeter.h
@@ -22,9 +22,6 @@ private:
 
     QLabel *m_label;
 
-    int m_signal;
-    int m_sigPeak;
-
 protected:
     void paintEvent( QPaintEvent * );
     void resizeEvent(QResizeEvent *s);
diff --git a/soundout.cpp b/soundout.cpp
index f8830d715..09a04689c 100644
--- a/soundout.cpp
+++ b/soundout.cpp
@@ -47,8 +47,7 @@ bool SoundOutput::audioError () const
 }
 
 SoundOutput::SoundOutput (QIODevice * source)
-  : m_source (source)
-  , m_active (false)
+  : m_active (false)
   , m_currentDevice (QAudioDeviceInfo::defaultOutputDevice ())
 {
   Q_ASSERT (source);
diff --git a/soundout.h b/soundout.h
index 12ba25d97..9fd7157fe 100644
--- a/soundout.h
+++ b/soundout.h
@@ -47,7 +47,6 @@ private Q_SLOTS:
 private:
   QScopedPointer<QAudioOutput> m_stream;
 
-  QIODevice * m_source;
   bool volatile m_active;
   QAudioDeviceInfo m_currentDevice;
   qreal m_volume;