diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index 408292db5..dafb14114 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -70,9 +70,15 @@ mp_obj_t modkandinsky_draw_string(size_t n_args, const mp_obj_t * args) {
   KDColor backgroundColor = (n_args >= 5) ? ColorForTuple(args[4]) : KDColorWhite;
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
   KDIonContext::sharedContext()->drawString(text, point, KDFont::LargeFont, textColor, backgroundColor);
-  /* drawString function might take some time to execute so we add an extra check
-   * for user interruption (to avoid freezing in an infinite loop calling
-   * 'drawString' for instance). */
+  /* Before and after execution of "modkandinsky_draw_string",
+   * "micropython_port_vm_hook_loop" is called by "mp_execute_bytecode" and will
+   * call "micropython_port_interrupt_if_needed" every 20000 calls.
+   * However, "drawString" function might take some time to execute leading to
+   * drastically decrease the frequency of calls to
+   * "micropython_port_vm_hook_loop" and thus to
+   * "micropython_port_interrupt_if_needed". So we add an extra
+   * check for user interruption here. This way the user can still interrupt an
+   * infinite loop calling 'drawString' for instance. */
   micropython_port_interrupt_if_needed();
   return mp_const_none;
 }
@@ -87,9 +93,7 @@ mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t * args) {
   KDColor color = ColorForTuple(args[4]);
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
   KDIonContext::sharedContext()->fillRect(rect, color);
-  /* fillRect function might take some time to execute so we add an extra check
-   * for user interruption (to avoid freezing in an infinite loop calling
-   * 'fillRect' for instance). */
+  // Cf comment on modkandinsky_draw_string
   micropython_port_interrupt_if_needed();
   return mp_const_none;
 }