diff --git a/include/rtservice.h b/include/rtservice.h
index fb491895ef49d46de03a3973e8f96584e738e8b2..31adc54a7351dcf639ddac9ad0c5b93c4a2c0183 100644
--- a/include/rtservice.h
+++ b/include/rtservice.h
@@ -37,7 +37,7 @@ extern "C" {
  */
 rt_inline void rt_list_init(rt_list_t *l)
 {
-	l->next = l->prev = l;
+    l->next = l->prev = l;
 }
 
 /**
@@ -48,11 +48,11 @@ rt_inline void rt_list_init(rt_list_t *l)
  */
 rt_inline void rt_list_insert_after(rt_list_t *l, rt_list_t *n)
 {
-	l->next->prev = n;
-	n->next = l->next;
+    l->next->prev = n;
+    n->next = l->next;
 
-	l->next = n;
-	n->prev = l;
+    l->next = n;
+    n->prev = l;
 }
 
 /**
@@ -63,11 +63,11 @@ rt_inline void rt_list_insert_after(rt_list_t *l, rt_list_t *n)
  */
 rt_inline void rt_list_insert_before(rt_list_t *l, rt_list_t *n)
 {
-	l->prev->next = n;
-	n->prev = l->prev;
+    l->prev->next = n;
+    n->prev = l->prev;
 
-	l->prev = n;
-	n->next = l;
+    l->prev = n;
+    n->next = l;
 }
 
 /**
@@ -76,10 +76,10 @@ rt_inline void rt_list_insert_before(rt_list_t *l, rt_list_t *n)
  */
 rt_inline void rt_list_remove(rt_list_t *n)
 {
-	n->next->prev = n->prev;
-	n->prev->next = n->next;
+    n->next->prev = n->prev;
+    n->prev->next = n->next;
 
-	n->next = n->prev = n;
+    n->next = n->prev = n;
 }
 
 /**
@@ -88,7 +88,7 @@ rt_inline void rt_list_remove(rt_list_t *n)
  */
 rt_inline int rt_list_isempty(const rt_list_t *l)
 {
-	return l->next == l;
+    return l->next == l;
 }
 
 /**