diff --git a/chalk/ui/kis_canvas.cc b/chalk/ui/kis_canvas.cc
index 2fdc813b8..bcffde585 100644
--- a/chalk/ui/kis_canvas.cc
+++ b/chalk/ui/kis_canvas.cc
@@ -314,7 +314,7 @@ void KisCanvasWidget::initX11Support()
             for (int i = 0; i < map->max_keypermod; i++) {
                 if (map->modifiermap[mapIndex]) {
 
-                    KeySym sym = XKeycodeToKeysym(x11Display, map->modifiermap[mapIndex], 0);
+                    KeySym sym = XkbKeycodeToKeysym(x11Display, map->modifiermap[mapIndex], 0, 0);
 
                     if (X11AltMask == 0 && (sym == XK_Alt_L || sym == XK_Alt_R)) {
                         X11AltMask = 1 << maskIndex;