diff --git a/qt/details.cc b/qt/details.cc
index 6647b9696..87e593632 100644
--- a/qt/details.cc
+++ b/qt/details.cc
@@ -381,7 +381,7 @@ Details :: refresh( )
         string = Formatter::ratioToString( torrents.first()->ratio() );
     else {
         bool isMixed = false;
-        int ratioType = torrents.first()->ratio();
+        int ratioType = (int) torrents.first()->ratio();
         if( ratioType > 0 ) ratioType = 0;
         foreach( const Torrent *t, torrents )
         {
@@ -636,11 +636,11 @@ Details :: refresh( )
         myBandwidthPriorityCombo->blockSignals( false );
 
         mySingleDownSpin->blockSignals( true );
-        mySingleDownSpin->setValue( tor->downloadLimit().KBps() );
+        mySingleDownSpin->setValue( (int)tor->downloadLimit().KBps() );
         mySingleDownSpin->blockSignals( false );
 
         mySingleUpSpin->blockSignals( true );
-        mySingleUpSpin->setValue( tor->uploadLimit().KBps() );
+        mySingleUpSpin->setValue( (int)tor->uploadLimit().KBps() );
         mySingleUpSpin->blockSignals( false );
 
         myPeerLimitSpin->blockSignals( true );
diff --git a/qt/formatter.cc b/qt/formatter.cc
index a6908107f..1da7b0baa 100644
--- a/qt/formatter.cc
+++ b/qt/formatter.cc
@@ -84,7 +84,7 @@ Speed :: KBps( ) const
 Speed
 Speed :: fromKBps( double KBps )
 {
-    return KBps * speed_K;
+    return int( KBps * speed_K );
 }
 
 /***
@@ -92,7 +92,7 @@ Speed :: fromKBps( double KBps )
 ***/
 
 QString
-Formatter :: memToString( double bytes )
+Formatter :: memToString( uint64_t bytes )
 {
     if( !bytes )
         return tr( "None" );
@@ -104,7 +104,7 @@ Formatter :: memToString( double bytes )
 }
 
 QString
-Formatter :: sizeToString( double bytes )
+Formatter :: sizeToString( uint64_t bytes )
 {
     if( !bytes )
         return tr( "None" );
diff --git a/qt/formatter.h b/qt/formatter.h
index 25cb6004d..e667c0861 100644
--- a/qt/formatter.h
+++ b/qt/formatter.h
@@ -30,8 +30,8 @@ class Formatter: public QObject
 
     public:
 
-        static QString memToString( double bytes );
-        static QString sizeToString( double bytes );
+        static QString memToString( uint64_t bytes );
+        static QString sizeToString( uint64_t bytes );
         static QString speedToString( const Speed& speed );
         static QString percentToString( double x );
         static QString ratioToString( double ratio );
diff --git a/qt/speed.h b/qt/speed.h
index b7e94d0ca..b057592ca 100644
--- a/qt/speed.h
+++ b/qt/speed.h
@@ -27,7 +27,7 @@ class Speed
         bool isZero( ) const { return _Bps == 0; }
         static Speed fromKBps( double KBps );
         static Speed fromBps( int Bps ) { return Speed( Bps ); }
-        void setBps( double Bps ) { _Bps = Bps; }
+        void setBps( int Bps ) { _Bps = Bps; }
         Speed& operator+=( const Speed& that ) { _Bps += that._Bps; return *this; }
         Speed operator+( const Speed& that ) const { return Speed( _Bps + that._Bps ); }
         bool operator<( const Speed& that ) const { return _Bps < that._Bps; }