diff --git a/cpukit/score/src/threadstartmultitasking.c b/cpukit/score/src/threadstartmultitasking.c
index 9fd2535e3b..291e42cffa 100644
--- a/cpukit/score/src/threadstartmultitasking.c
+++ b/cpukit/score/src/threadstartmultitasking.c
@@ -19,6 +19,7 @@
 #endif
 
 #include <rtems/score/threadimpl.h>
+#include <rtems/score/assert.h>
 
 void _Thread_Start_multitasking( void )
 {
@@ -57,6 +58,7 @@ void _Thread_Start_multitasking( void )
      */
     _CPU_Context_Set_is_executing( &trash, true );
     _CPU_Context_switch( &trash, &heir->Registers );
+    RTEMS_UNREACHABLE();
   }
 #else
   _CPU_Context_Restart_self( &heir->Registers );