diff --git a/LibOS/shim/src/shim_init.c b/LibOS/shim/src/shim_init.c
index 2ec85ff2..d838d7e2 100644
--- a/LibOS/shim/src/shim_init.c
+++ b/LibOS/shim/src/shim_init.c
@@ -874,8 +874,7 @@ void check_stack_hook (void)
 {
     struct shim_thread * cur_thread = get_cur_thread();
 
-    void * rsp;
-    __asm__ volatile ("movq %%rsp, %0" : "=r"(rsp) :: "memory");
+    void* rsp = current_stack();
 
     if (rsp <= cur_thread->stack_top && rsp > cur_thread->stack) {
         if ((uintptr_t)rsp - (uintptr_t)cur_thread->stack < PAL_CB(alloc_align))