diff --git a/platforms/qemu_integratorcp/main.c b/platforms/qemu_integratorcp/main.c
index 3222170..45b39d7 100644
--- a/platforms/qemu_integratorcp/main.c
+++ b/platforms/qemu_integratorcp/main.c
@@ -78,7 +78,7 @@ main (void)
     printf ("atomthreads starting %s... ", ATOMTHREADS_TEST) ;
 
 	atomOSInit(&idle_stack[IDLE_STACK_BYTE_SIZE - sizeof(unsigned int)], IDLE_STACK_BYTE_SIZE - sizeof(unsigned int)) ;
-    atomThreadCreate ((ATOM_TCB *)&test_tcb, TEST_THREAD_PRIO, test_thread, 0, &test_stack[(TEST_STACK_BYTE_SIZE) - sizeof(unsigned int)], TEST_STACK_BYTE_SIZE  - sizeof(unsigned int));
+    atomThreadCreate ((ATOM_TCB *)&test_tcb, TEST_THREAD_PRIO, test_thread, 0, &test_stack[0], TEST_STACK_BYTE_SIZE);
     atomOSStart() ;
 
     return 0 ;