diff --git a/lv_objx/lv_arc.c b/lv_objx/lv_arc.c
index ed40112116..5314e99ac9 100644
--- a/lv_objx/lv_arc.c
+++ b/lv_objx/lv_arc.c
@@ -3,12 +3,6 @@
  *
  */
 
-/* TODO Remove these instructions
- * Search an replace: arc -> object normal name with lower case (e.g. button, label etc.)
- *                    arc -> object short name with lower case(e.g. btn, label etc)
- *                    ARC -> object short name with upper case (e.g. BTN, LABEL etc.)
- *
- */
 
 /*********************
  *      INCLUDES
diff --git a/lv_objx/lv_arc.h b/lv_objx/lv_arc.h
index 6a925186ac..acf3976ded 100644
--- a/lv_objx/lv_arc.h
+++ b/lv_objx/lv_arc.h
@@ -14,7 +14,12 @@ extern "C" {
 /*********************
  *      INCLUDES
  *********************/
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lv_conf.h"
+#else
 #include "../../lv_conf.h"
+#endif
+
 #if USE_LV_ARC != 0
 
 #include "../lv_core/lv_obj.h"
diff --git a/lv_objx/lv_calendar.c b/lv_objx/lv_calendar.c
index 945ee4cfea..66cdc7154e 100644
--- a/lv_objx/lv_calendar.c
+++ b/lv_objx/lv_calendar.c
@@ -6,10 +6,9 @@
 /*********************
  *      INCLUDES
  *********************/
-#include "../../lv_conf.h"
+#include "lv_calendar.h"
 #if USE_LV_CALENDAR != 0
 
-#include "lv_calendar.h"
 #include "../lv_draw/lv_draw.h"
 #include "../lv_hal/lv_hal_indev.h"
 #include "../lv_misc/lv_math.h"
diff --git a/lv_objx/lv_calendar.h b/lv_objx/lv_calendar.h
index 04561f9367..78c26f95d4 100644
--- a/lv_objx/lv_calendar.h
+++ b/lv_objx/lv_calendar.h
@@ -13,7 +13,12 @@ extern "C" {
 /*********************
  *      INCLUDES
  *********************/
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lv_conf.h"
+#else
 #include "../../lv_conf.h"
+#endif
+
 #if USE_LV_CALENDAR != 0
 
 #include "../lv_core/lv_obj.h"
diff --git a/lv_objx/lv_preload.c b/lv_objx/lv_preload.c
index 8276a7983f..78043b0a8c 100644
--- a/lv_objx/lv_preload.c
+++ b/lv_objx/lv_preload.c
@@ -6,10 +6,9 @@
 /*********************
  *      INCLUDES
  *********************/
-#include "../../lv_conf.h"
+#include "lv_preload.h"
 #if USE_LV_PRELOAD != 0
 
-#include "lv_preload.h"
 #include "../lv_misc/lv_math.h"
 #include "../lv_draw/lv_draw_rect.h"
 #include "../lv_draw/lv_draw_arc.h"
@@ -72,7 +71,7 @@ lv_obj_t * lv_preload_create(lv_obj_t * par, lv_obj_t * copy)
     /*The signal and design functions are not copied so set them here*/
     lv_obj_set_signal_func(new_preload, lv_preload_signal);
     lv_obj_set_design_func(new_preload, lv_preload_design);
-
+#if USE_LV_ANIMATION
     lv_anim_t a;
     a.var = new_preload;
     a.start = 0;
@@ -87,6 +86,7 @@ lv_obj_t * lv_preload_create(lv_obj_t * par, lv_obj_t * copy)
     a.repeat = 1;
     a.repeat_pause = 0;
     lv_anim_create(&a);
+#endif
 
     /*Init the new pre loader pre loader*/
     if(copy == NULL) {
@@ -130,7 +130,7 @@ void lv_preload_set_spin_time(lv_obj_t * preload, uint16_t time)
     lv_preload_ext_t * ext = lv_obj_get_ext_attr(preload);
 
     ext->time = time;
-
+#if USE_LV_ANIMATION
     lv_anim_t a;
     a.var = preload;
     a.start = 0;
@@ -145,6 +145,7 @@ void lv_preload_set_spin_time(lv_obj_t * preload, uint16_t time)
     a.repeat = 1;
     a.repeat_pause = 0;
     lv_anim_create(&a);
+#endif
 }
 /*=====================
  * Setter functions
diff --git a/lv_objx/lv_preload.h b/lv_objx/lv_preload.h
index f2a38c9f3f..224dcb6f9b 100644
--- a/lv_objx/lv_preload.h
+++ b/lv_objx/lv_preload.h
@@ -13,9 +13,23 @@ extern "C" {
 /*********************
  *      INCLUDES
  *********************/
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lv_conf.h"
+#else
 #include "../../lv_conf.h"
+#endif
+
 #if USE_LV_PRELOAD != 0
 
+/*Testing of dependencies*/
+#if USE_LV_ARC == 0
+#error "lv_preload: lv_arc is required. Enable it in lv_conf.h (USE_LV_ARC  1) "
+#endif
+
+#if USE_LV_ANIMATION == 0
+#error "lv_preload: animations are required. Enable it in lv_conf.h (USE_LV_ANIMATION  1) "
+#endif
+
 #include "../lv_core/lv_obj.h"
 #include "lv_arc.h"