diff --git a/3rdparty/quazip/quazip/unzip.c b/3rdparty/quazip/quazip/unzip.c
index 6e115ae6..86d0037b 100644
--- a/3rdparty/quazip/quazip/unzip.c
+++ b/3rdparty/quazip/quazip/unzip.c
@@ -1245,7 +1245,7 @@ extern int ZEXPORT unzReadCurrentFile  (file, buf, len)
         return UNZ_PARAMERROR;
 
 
-    if ((pfile_in_zip_read_info->read_buffer == NULL))
+    if (pfile_in_zip_read_info->read_buffer == NULL)
         return UNZ_END_OF_LIST_OF_FILE;
     if (len==0)
         return 0;
diff --git a/3rdparty/quazip/quazip/zip.c b/3rdparty/quazip/quazip/zip.c
index 774fd7b5..2a78ef86 100644
--- a/3rdparty/quazip/quazip/zip.c
+++ b/3rdparty/quazip/quazip/zip.c
@@ -777,9 +777,9 @@ extern int ZEXPORT zipOpenNewFileInZip3 (file, filename, zipfi,
     zi->ci.flag = 0;
     if ((level==8) || (level==9))
       zi->ci.flag |= 2;
-    if ((level==2))
+    if (level==2)
       zi->ci.flag |= 4;
-    if ((level==1))
+    if (level==1)
       zi->ci.flag |= 6;
     if (password != NULL)
     {
diff --git a/src/Graphs/gGraphView.cpp b/src/Graphs/gGraphView.cpp
index ae3ac9ab..5ac7ebbc 100644
--- a/src/Graphs/gGraphView.cpp
+++ b/src/Graphs/gGraphView.cpp
@@ -2317,7 +2317,7 @@ bool gGraphView::usePixmapCache()
 void gGraphView::DrawTextQue()
 {
     const qint64 expire_after_ms=4000; // expire string pixmaps after this many milliseconds
-    const qint64 under_limit_cache_bonus=30000; // If under the limit, give a bonus to the millisecond timeout.
+    //const qint64 under_limit_cache_bonus=30000; // If under the limit, give a bonus to the millisecond timeout.
     const qint32 max_pixmap_cache=4*1048576;  // Maximum size of pixmap cache (it can grow over this, but only temporarily)
 
     quint64 ti=0,exptime=0;
diff --git a/src/Graphs/gYAxis.cpp b/src/Graphs/gYAxis.cpp
index 84be8e48..302f4cbd 100644
--- a/src/Graphs/gYAxis.cpp
+++ b/src/Graphs/gYAxis.cpp
@@ -138,7 +138,7 @@ gYAxis::~gYAxis()
 }
 void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
 {
-    int x,y,yh=0;
+    int x,y;//,yh=0;
 
     //Todo: clean this up as there is a lot of duplicate code between the sections
 
diff --git a/src/daily.cpp b/src/daily.cpp
index d368ba9b..bb23e6d2 100644
--- a/src/daily.cpp
+++ b/src/daily.cpp
@@ -498,7 +498,7 @@ void Daily::UpdateEventsTree(QTreeWidget *tree,Day *day)
                 total_events+=cnt;
                 QString st=schema::channel[code].description();
                 if (st.isEmpty())  {
-                    st="Fixme %1"+code;
+                    st=QString("Fixme %1").arg(code);
                 }
                 st+=" ";
                 if (cnt==1) st+=tr("%1 event").arg(cnt);
diff --git a/src/oximetry.cpp b/src/oximetry.cpp
index f704dc98..0a911c10 100644
--- a/src/oximetry.cpp
+++ b/src/oximetry.cpp
@@ -1176,7 +1176,7 @@ void Oximetry::serialImport()
 //    QApplication::processEvents();
 }
 
-void Oximetry::cancel_CheckPorts(QAbstractButton*b)
+void Oximetry::cancel_CheckPorts(QAbstractButton*)
 {
     qDebug() << "cancel_CheckPorts()";
     cancel_Import=true;