diff --git a/src/debugger/gui/DebuggerDialog.cxx b/src/debugger/gui/DebuggerDialog.cxx
index cfeac07d2..9d0e7a2cb 100644
--- a/src/debugger/gui/DebuggerDialog.cxx
+++ b/src/debugger/gui/DebuggerDialog.cxx
@@ -63,7 +63,7 @@ DebuggerDialog::DebuggerDialog(OSystem& osystem, DialogContainer& parent,
   // Inform the TIA output widget about its associated zoom widget
   myTiaOutput->setZoomWidget(myTiaZoom);
 
-  myOptions = make_unique<OptionsDialog>(osystem, parent, this, w, h, true);
+  myOptions = make_unique<OptionsDialog>(osystem, parent, this, w, h, false);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/gui/DeveloperDialog.cxx b/src/gui/DeveloperDialog.cxx
index 90d89b1b9..eb8b0b18e 100644
--- a/src/gui/DeveloperDialog.cxx
+++ b/src/gui/DeveloperDialog.cxx
@@ -959,7 +959,10 @@ void DeveloperDialog::handleTimeMachine()
 
   myStateIntervalWidget->setEnabled(enable);
 
-  myStateHorizonWidget->setEnabled(enable);
+  uInt32 size = myStateSizeWidget->getValue();
+  uInt32 uncompressed = myUncompressedWidget->getValue();
+
+  myStateHorizonWidget->setEnabled(enable && size > uncompressed);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -