diff --git a/docs/porting/indev.md b/docs/porting/indev.md
index 0769640dcd..0066f56d2e 100644
--- a/docs/porting/indev.md
+++ b/docs/porting/indev.md
@@ -5,6 +5,7 @@
 To register an input device an `lv_indev_drv_t` variable has to be initialized. **Be sure to register at least one display before you register any input devices.**
 
 ```c
+/*Register at least one display before you register any input devices*/
 lv_disp_drv_register(&disp_drv);
 
 static lv_indev_drv_t indev_drv;