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-rw-r--r--src/cpu/x86/smm/smm_stub.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cpu/x86/smm/smm_stub.S b/src/cpu/x86/smm/smm_stub.S
index 56e2504892..45f634d0c9 100644
--- a/src/cpu/x86/smm/smm_stub.S
+++ b/src/cpu/x86/smm/smm_stub.S
@@ -144,6 +144,9 @@ smm_trampoline32:
movl stack_size, %eax
subl %eax, %ebx /* %ebx(stack_top) - size = %ebx(stack_bottom) */
movl %ebx, (%ebx)
+#if ENV_X86_64
+ movl $0, 4(%ebx)
+#endif
/* Create stack frame by pushing a NULL stack base pointer */
pushl $0x0