diff --git a/src/core/lv_obj_style.c b/src/core/lv_obj_style.c
index 9780383a3..ee8e212c0 100644
--- a/src/core/lv_obj_style.c
+++ b/src/core/lv_obj_style.c
@@ -121,7 +121,7 @@ void lv_obj_add_style(lv_obj_t * obj, const lv_style_t * style, lv_style_selecto
 
 #if LV_OBJ_STYLE_CACHE
     uint32_t * prop_is_set = part == LV_PART_MAIN ? &obj->style_main_prop_is_set : &obj->style_other_prop_is_set;
-    if(style->prop_cnt == 255) {
+    if(lv_style_is_const(style)) {
         lv_style_const_prop_t * props = style->values_and_props;
         for(i = 0; props[i].prop_ptr; i++) {
             (*prop_is_set) |= (uint32_t)1 << ((*props[i].prop_ptr) >> 2);
@@ -1058,7 +1058,7 @@ static void full_cache_refresh(lv_obj_t * obj, lv_part_t part)
             if(lv_obj_style_get_selector_part(obj->styles[i].selector) != LV_PART_MAIN) continue;
             lv_style_t * style = (lv_style_t *)obj->styles[i].style;
             uint32_t j;
-            if(style->prop_cnt == 255) {
+            if(lv_style_is_const(style)) {
                 lv_style_const_prop_t * props = style->values_and_props;
                 for(j = 0; props[j].prop_ptr; j++) {
                     obj->style_main_prop_is_set |= (uint32_t)1 << ((*props[j].prop_ptr) >> 2);
@@ -1078,7 +1078,7 @@ static void full_cache_refresh(lv_obj_t * obj, lv_part_t part)
             if(lv_obj_style_get_selector_part(obj->styles[i].selector) == LV_PART_MAIN) continue;
             lv_style_t * style = (lv_style_t *)obj->styles[i].style;
             uint32_t j;
-            if(style->prop_cnt == 255) {
+            if(lv_style_is_const(style)) {
                 lv_style_const_prop_t * props = style->values_and_props;
                 for(j = 0; props[j].prop_ptr; j++) {
                     obj->style_other_prop_is_set |= (uint32_t)1 << ((*props[j].prop_ptr) >> 2);
@@ -1110,7 +1110,7 @@ static void fade_in_anim_ready(lv_anim_t * a)
 
 static bool style_has_flag(const lv_style_t * style, uint32_t flag)
 {
-    if(style->prop_cnt == 255) {
+    if(lv_style_is_const(style)) {
         lv_style_const_prop_t * props = style->values_and_props;
         uint32_t i;
         for(i = 0; props[i].prop_ptr; i++) {
diff --git a/src/misc/lv_style.c b/src/misc/lv_style.c
index 7c9f06513..ce7df4107 100644
--- a/src/misc/lv_style.c
+++ b/src/misc/lv_style.c
@@ -216,7 +216,7 @@ bool lv_style_remove_prop(lv_style_t * style, lv_style_prop_t prop)
 {
     LV_ASSERT_STYLE(style);
 
-    if(style->prop_cnt == 255) {
+    if(lv_style_is_const(style)) {
         LV_LOG_ERROR("Cannot remove prop from const style");
         return false;
     }
@@ -261,7 +261,7 @@ void lv_style_set_prop(lv_style_t * style, lv_style_prop_t prop, lv_style_value_
 {
     LV_ASSERT_STYLE(style);
 
-    if(style->prop_cnt == 255) {
+    if(lv_style_is_const(style)) {
         LV_LOG_ERROR("Cannot set property of constant style");
         return;
     }
diff --git a/src/misc/lv_style.h b/src/misc/lv_style.h
index c23da7ec3..9f3a42c42 100644
--- a/src/misc/lv_style.h
+++ b/src/misc/lv_style.h
@@ -398,6 +398,17 @@ void lv_style_init(lv_style_t * style);
  */
 void lv_style_reset(lv_style_t * style);
 
+/**
+ * Check if a style is constant
+ * @param style     pointer to a style
+ * @return          true: the style is constant
+ */
+static inline bool lv_style_is_const(const lv_style_t * style)
+{
+    if(style->prop_cnt == 255) return true;
+    return false;
+}
+
 /**
  * Register a new style property for custom usage
  * @return a new property ID, or LV_STYLE_PROP_INV if there are no more available.
@@ -483,7 +494,7 @@ lv_style_value_t lv_style_prop_get_default(lv_style_prop_t prop);
 static inline lv_style_res_t lv_style_get_prop_inlined(const lv_style_t * style, lv_style_prop_t prop,
                                                        lv_style_value_t * value)
 {
-    if(style->prop_cnt == 255) {
+    if(lv_style_is_const(style)) {
         lv_style_const_prop_t * props = (lv_style_const_prop_t *)style->values_and_props;
         uint32_t i;
         for(i = 0; props[i].prop_ptr; i++) {