diff --git a/src/engine/platform/x1_010.cpp b/src/engine/platform/x1_010.cpp
index 4c6a4516..8824271e 100644
--- a/src/engine/platform/x1_010.cpp
+++ b/src/engine/platform/x1_010.cpp
@@ -931,10 +931,6 @@ void DivPlatformX1_010::setFlags(const DivConfig& flags) {
       chipClock=50000000.0/3.0;
       break;
     // Other clock is used
-    case 2: // NTSC clock * 4
-    // (see https://github.com/mamedev/mame/blob/master/src/mame/taito/champbwl.cpp#L620)
-      chipClock=COLOR_NTSC*4.0;
-      break;
     default:
       chipClock=16000000;
       break;
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 6084ab1f..a2e927cb 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -856,10 +856,6 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
         clockSel=1;
         altered=true;
       }
-      if (ImGui::RadioButton("14.32MHz (NTSC)",clockSel==2)) {
-        clockSel=2;
-        altered=true;
-      }
 
       if (ImGui::Checkbox("Stereo",&stereo)) {
         altered=true;