diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index c9579236b..27b7ec5b1 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -85,13 +85,21 @@ mp_obj_t modkandinsky_draw_string(size_t n_args, const mp_obj_t * args) {
 }
 
 mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t * args) {
-  KDRect rect(
-    mp_obj_get_int(args[0]),
-    mp_obj_get_int(args[1]),
-    mp_obj_get_int(args[2]),
-    mp_obj_get_int(args[3])
-  );
+  mp_int_t x = mp_obj_get_int(args[0]);
+  mp_int_t y = mp_obj_get_int(args[1]);
+  mp_int_t width = mp_obj_get_int(args[2]);
+  mp_int_t height = mp_obj_get_int(args[3]);
+  if (width < 0) {
+    width = -width;
+    x = x - width;
+  }
+  if (height < 0) {
+    height = -height;
+    y = y - height;
+  }
+  KDRect rect(x, y, width, height);
   KDColor color = ColorForTuple(args[4]);
+
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
   KDIonContext::sharedContext()->fillRect(rect, color);
   // Cf comment on modkandinsky_draw_string