diff --git a/c/src/exec/posix/src/pthreadsetschedparam.c b/c/src/exec/posix/src/pthreadsetschedparam.c
index 50d3bbcea3..97bc4351b7 100644
--- a/c/src/exec/posix/src/pthreadsetschedparam.c
+++ b/c/src/exec/posix/src/pthreadsetschedparam.c
@@ -115,6 +115,7 @@ int pthread_setschedparam(
  
         case SCHED_SPORADIC:
           api->ss_high_priority = api->schedparam.sched_priority;
+          _Watchdog_Remove( &api->Sporadic_timer );
           _POSIX_Threads_Sporadic_budget_TSR( 0, the_thread );
           break;
       }
diff --git a/cpukit/posix/src/pthreadsetschedparam.c b/cpukit/posix/src/pthreadsetschedparam.c
index 50d3bbcea3..97bc4351b7 100644
--- a/cpukit/posix/src/pthreadsetschedparam.c
+++ b/cpukit/posix/src/pthreadsetschedparam.c
@@ -115,6 +115,7 @@ int pthread_setschedparam(
  
         case SCHED_SPORADIC:
           api->ss_high_priority = api->schedparam.sched_priority;
+          _Watchdog_Remove( &api->Sporadic_timer );
           _POSIX_Threads_Sporadic_budget_TSR( 0, the_thread );
           break;
       }