diff --git a/src/debugger/gui/QuadTariWidget.cxx b/src/debugger/gui/QuadTariWidget.cxx
index aca263a86..7a76b0524 100644
--- a/src/debugger/gui/QuadTariWidget.cxx
+++ b/src/debugger/gui/QuadTariWidget.cxx
@@ -30,7 +30,7 @@ QuadTariWidget::QuadTariWidget(GuiObject* boss, const GUI::Font& font,
 {
   string label = (isLeftPort() ? "Left" : "Right") + string(" (QuadTari)");
   StaticTextWidget* t = new StaticTextWidget(boss, font, x, y + 2, label);
-  QuadTari& qt = dynamic_cast<QuadTari&>(controller);
+  QuadTari& qt = (QuadTari&)controller;
 
   x += font.getMaxCharWidth() * 2;
   y = t->getBottom() + font.getFontHeight() * 1.25;
diff --git a/src/emucore/Control.hxx b/src/emucore/Control.hxx
index d1ed02b8b..48eb303f5 100644
--- a/src/emucore/Control.hxx
+++ b/src/emucore/Control.hxx
@@ -178,7 +178,7 @@ class Controller : public Serializable
       Update the entire digital and analog pin state according to the
       events currently set.
     */
-    virtual void update() { };
+    virtual void update() { }
 
     /**
       Returns the name of this controller.
diff --git a/src/emucore/QuadTari.cxx b/src/emucore/QuadTari.cxx
index e249c7f14..598b37fb8 100644
--- a/src/emucore/QuadTari.cxx
+++ b/src/emucore/QuadTari.cxx
@@ -61,7 +61,7 @@ bool QuadTari::read(DigitalPin pin)
   // can switch the controller multiple times per frame
   // (we can't just read 60 times per second in the ::update() method)
 
-  constexpr int MIN_CYCLES = 30 * 76; // minimal cycles required for stable input switch (TODO: define cycles)
+  constexpr int MIN_CYCLES = 20 * 76; // minimal cycles required for stable input switch (TODO: define cycles)
   bool readFirst;
 
   if(mySystem.tia().dumpPortsCycles() < MIN_CYCLES)