diff --git a/os/kernel/include/chinline.h b/os/kernel/include/chinline.h
index 65d487804..663e458a8 100644
--- a/os/kernel/include/chinline.h
+++ b/os/kernel/include/chinline.h
@@ -43,13 +43,15 @@ static INLINE void prio_insert(Thread *tp, ThreadsQueue *tqp) {
   do {
     cp = cp->p_next;
   } while ((cp != (Thread *)tqp) && (cp->p_prio >= tp->p_prio));
-  tp->p_prev = (tp->p_next = cp)->p_prev;
+  tp->p_next = cp;
+  tp->p_prev = cp->p_prev;
   tp->p_prev->p_next = cp->p_prev = tp;
 }
 
 static INLINE void queue_insert(Thread *tp, ThreadsQueue *tqp) {
 
-  tp->p_prev = (tp->p_next = (Thread *)tqp)->p_prev;
+  tp->p_next = (Thread *)tqp;
+  tp->p_prev = tqp->p_prev;
   tp->p_prev->p_next = tqp->p_prev = tp;
 }
 
diff --git a/os/kernel/src/chlists.c b/os/kernel/src/chlists.c
index db3b52abc..62cb08d3b 100644
--- a/os/kernel/src/chlists.c
+++ b/os/kernel/src/chlists.c
@@ -55,9 +55,9 @@ void prio_insert(Thread *tp, ThreadsQueue *tqp) {
     cp = cp->p_next;
     /* Not end of queue? and cp has equal or higher priority than tp?.*/
   } while ((cp != (Thread *)tqp) && (cp->p_prio >= tp->p_prio));
-  /* Insert before cp, point tp to next and prev in queue.*/
-  tp->p_prev = (tp->p_next = cp)->p_prev;
-  /* Make prev point to tp, and cp point back to tp.*/
+  /* Insertion on p_prev.*/
+  tp->p_next = cp;
+  tp->p_prev = cp->p_prev;
   tp->p_prev->p_next = cp->p_prev = tp;
 }
 
@@ -70,7 +70,8 @@ void prio_insert(Thread *tp, ThreadsQueue *tqp) {
  */
 void queue_insert(Thread *tp, ThreadsQueue *tqp) {
 
-  tp->p_prev = (tp->p_next = (Thread *)tqp)->p_prev;
+  tp->p_next = (Thread *)tqp;
+  tp->p_prev = tqp->p_prev;
   tp->p_prev->p_next = tqp->p_prev = tp;
 }
 
diff --git a/os/kernel/src/chschd.c b/os/kernel/src/chschd.c
index 4b04cbe59..4599ccd1a 100644
--- a/os/kernel/src/chschd.c
+++ b/os/kernel/src/chschd.c
@@ -85,7 +85,8 @@ Thread *chSchReadyI(Thread *tp) {
     cp = cp->p_next;
   } while (cp->p_prio >= tp->p_prio);
   /* Insertion on p_prev.*/
-  tp->p_prev = (tp->p_next = cp)->p_prev;
+  tp->p_next = cp;
+  tp->p_prev = cp->p_prev;
   tp->p_prev->p_next = cp->p_prev = tp;
   return tp;
 }
diff --git a/readme.txt b/readme.txt
index 69f77545a..4f97c4158 100644
--- a/readme.txt
+++ b/readme.txt
@@ -59,6 +59,7 @@
 *****************************************************************************
 
 *** 2.0.3 ***
+- FIX: Fixed crash of the Posix simulator under Ubuntu 10.4 (bug 3055329).
 - FIX: Fixed incorrect PLL2 setting in STM32 HAL (bug 3044770).
 - FIX: Fixed wrong check on STM32_HCLK (bug 3044758).
 - FIX: Fixed wrong condition check in STM32 PWM driver (bug 3041414).