diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 9d258d1b4..ac2e59fe4 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -433,6 +433,8 @@ bool FurnaceGUI::isCtrlWheelModifierHeld() const {
       return ImGui::IsKeyDown(ImGuiMod_Ctrl);
     case 2:
       return ImGui::IsKeyDown(ImGuiMod_Super);
+    case 3:
+      return ImGui::IsKeyDown(ImGuiMod_Alt);
     default:
       return false;
   }
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 0c06f98e4..ad760675d 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -2752,6 +2752,11 @@ void FurnaceGUI::drawSettings() {
           settings.ctrlWheelModifier=2;
           settingsChanged=true;
         }
+        // technically this key is called Option on mac, but we call it Alt in getKeyName(s)
+        if (ImGui::RadioButton(_("Alt##cwm4"),settings.ctrlWheelModifier==3)) {
+          settings.ctrlWheelModifier=3;
+          settingsChanged=true;
+        }
         ImGui::Unindent();
 
         bool doubleClickColumnB=settings.doubleClickColumn;
@@ -5158,7 +5163,7 @@ void FurnaceGUI::readConfig(DivConfig& conf, FurnaceGUISettingGroups groups) {
   clampSetting(settings.patRowsBase,0,1);
   clampSetting(settings.orderRowsBase,0,1);
   clampSetting(settings.soloAction,0,2);
-  clampSetting(settings.ctrlWheelModifier,0,2);
+  clampSetting(settings.ctrlWheelModifier,0,3);
   clampSetting(settings.pullDeleteBehavior,0,1);
   clampSetting(settings.wrapHorizontal,0,2);
   clampSetting(settings.wrapVertical,0,3);