diff --git a/src/preferences/keymap/ModifierKeysWindow.cpp b/src/preferences/keymap/ModifierKeysWindow.cpp
index f880a82f94..91d3f3f992 100644
--- a/src/preferences/keymap/ModifierKeysWindow.cpp
+++ b/src/preferences/keymap/ModifierKeysWindow.cpp
@@ -398,7 +398,7 @@ ModifierKeysWindow::_KeyToString(int32 key)
 
 
 uint32
-ModifierKeysWindow::_KeyToKeyCode(int32 key, bool right = false)
+ModifierKeysWindow::_KeyToKeyCode(int32 key, bool right)
 {
 	switch (key) {
 		case MENU_ITEM_CAPS_LOCK: