diff --git a/kitty/boss.py b/kitty/boss.py
index 300cea63a..c3223bb15 100644
--- a/kitty/boss.py
+++ b/kitty/boss.py
@@ -48,7 +48,7 @@ class Timers(_Timers):
     def add(self, delay, timer, *args):
         # Needed because bound methods are recreated on every access
         timer = self.timer_hash.setdefault(timer, timer)
-        return _Timers.add(self, delay, timer) if args else _Timers.add(self, delay, timer, args)
+        return _Timers.add(self, delay, timer, args) if args else _Timers.add(self, delay, timer)
 
     def remove(self, timer):
         # Needed because bound methods are recreated on every access
@@ -240,7 +240,7 @@ class Boss(Thread):
         # debounce resize events
         self.pending_resize = True
         yield
-        self.timers.add(0.02, self.apply_pending_resize, (w, h))
+        self.timers.add(0.02, self.apply_pending_resize, w, h)
 
     def apply_pending_resize(self, w, h):
         if w > 100 and h > 100:
diff --git a/kitty/child-monitor.c b/kitty/child-monitor.c
index 5f5fe8f38..bc43432be 100644
--- a/kitty/child-monitor.c
+++ b/kitty/child-monitor.c
@@ -165,7 +165,7 @@ loop(ChildMonitor *self) {
         timers_call(self->timers);
         for (i = 0; i < self->count; i++) {
             if (self->children[i].screen->change_tracker->dirty) {
-                if (!timers_add_if_missing(self->timers, self->repaint_delay, self->children->update_screen, NULL)) PyErr_Print();
+                if (!timers_add_if_missing(self->timers, self->repaint_delay, self->children[i].update_screen, NULL)) PyErr_Print();
             }
         }
     }