diff --git a/src/os/rtems/src/os-impl-timebase.c b/src/os/rtems/src/os-impl-timebase.c
index f9a5b4a2f..3d9c4afd8 100644
--- a/src/os/rtems/src/os-impl-timebase.c
+++ b/src/os/rtems/src/os-impl-timebase.c
@@ -286,6 +286,24 @@ void OS_UsecsToTicks(uint32 usecs, rtems_interval *ticks)
 /* The user may specify whether to use priority inheritance on mutexes via osconfig.h */
 #define OSAL_TIMEBASE_MUTEX_ATTRIBS RTEMS_PRIORITY | RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY
 
+/*----------------------------------------------------------------
+ *
+ * Function: OS_TimeBase_CallbackThreadEntry
+ *
+ *  Purpose: Local helper routine, not part of OSAL API.
+ *           Wrapper function used by OS_TimeBaseCreate_Impl to
+ *           convert the rtems_task_argument on newly created
+ *           timebase task into an osal_id_t used by the
+ *           OS_TimeBase_CallbackThread.
+ *
+ *-----------------------------------------------------------------*/
+static void OS_TimeBase_CallbackThreadEntry(rtems_task_argument arg)
+{
+    osal_id_t id;
+    id = OS_ObjectIdFromInteger(arg);
+    OS_TimeBase_CallbackThread(id);
+}
+
 /*----------------------------------------------------------------
  *
  * Function: OS_TimeBaseCreate_Impl
@@ -390,9 +408,9 @@ int32 OS_TimeBaseCreate_Impl(const OS_object_token_t *token)
         else
         {
             /* will place the task in 'ready for scheduling' state */
-            rtems_sc = rtems_task_start(local->handler_task,                          /*rtems task id*/
-                                        (rtems_task_entry)OS_TimeBase_CallbackThread, /* task entry point */
-                                        (rtems_task_argument)r_name);                 /* passed argument  */
+            rtems_sc = rtems_task_start(local->handler_task,             /* rtems task id */
+                                        OS_TimeBase_CallbackThreadEntry, /* task entry point */
+                                        (rtems_task_argument)r_name);    /* passed argument  */
 
             if (rtems_sc != RTEMS_SUCCESSFUL)
             {