diff --git a/OSBindings/Mac/Clock Signal/Documents/ElectronDocument.swift b/OSBindings/Mac/Clock Signal/Documents/ElectronDocument.swift
index 92c66b45d..bed4fa3d1 100644
--- a/OSBindings/Mac/Clock Signal/Documents/ElectronDocument.swift	
+++ b/OSBindings/Mac/Clock Signal/Documents/ElectronDocument.swift	
@@ -130,5 +130,6 @@ class ElectronDocument: MachineDocument {
 		electron.setKey(VK_Shift, isPressed: newModifiers.modifierFlags.contains(.ShiftKeyMask))
 		electron.setKey(VK_Control, isPressed: newModifiers.modifierFlags.contains(.ControlKeyMask))
 		electron.setKey(VK_Command, isPressed: newModifiers.modifierFlags.contains(.CommandKeyMask))
+		electron.setKey(VK_Option, isPressed: newModifiers.modifierFlags.contains(.AlternateKeyMask))
 	}
 }
diff --git a/OSBindings/Mac/Clock Signal/Wrappers/CSElectron.mm b/OSBindings/Mac/Clock Signal/Wrappers/CSElectron.mm
index 7900a4776..3943dc360 100644
--- a/OSBindings/Mac/Clock Signal/Wrappers/CSElectron.mm	
+++ b/OSBindings/Mac/Clock Signal/Wrappers/CSElectron.mm	
@@ -134,7 +134,7 @@
 
 			case VK_Shift:			_electron.set_key_state(Electron::Key::KeyShift, isPressed);		break;
 			case VK_Control:		_electron.set_key_state(Electron::Key::KeyControl, isPressed);		break;
-			case VK_Command:		_electron.set_key_state(Electron::Key::KeyFunc, isPressed);			break;
+			case VK_Option:			_electron.set_key_state(Electron::Key::KeyFunc, isPressed);			break;
 
 			case VK_F12:			_electron.set_key_state(Electron::Key::KeyBreak, isPressed);		break;