diff --git a/kernel/trunk/core/sched.inc b/kernel/trunk/core/sched.inc
index 6eb5e66a2e..3f7fecf2b1 100644
--- a/kernel/trunk/core/sched.inc
+++ b/kernel/trunk/core/sched.inc
@@ -225,9 +225,9 @@ do_change_task:
         je @F
         mov cr3, eax
 @@:
-        mov ebx, [ebx+APPDATA.pl0_stack]
-        add ebx, RING0_STACK_SIZE
-        mov [tss._esp0], ebx
+        mov eax, [ebx+APPDATA.pl0_stack]
+        add eax, RING0_STACK_SIZE
+        mov [tss._esp0], eax
         mov ax, graph_data
         mov gs, ax
         mov ecx, cr0