diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig
index 1852e78a0b..2253e18ade 100644
--- a/src/cpu/x86/Kconfig
+++ b/src/cpu/x86/Kconfig
@@ -159,13 +159,6 @@ config SMM_MODULE_STACK_SIZE
 	  This option determines the size of the stack within the SMM handler
 	  modules.
 
-config SMM_STUB_STACK_SIZE
-	hex
-	default 0x400
-	help
-	  This option determines the size of the stack within the SMM handler
-	  modules.
-
 endif
 
 config SMM_LAPIC_REMAP_MITIGATION