diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 5cfbd8011698..f94cdb7aca50 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -45,7 +45,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
 		/* Intel-defined (#2) */
-		"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "est",
+		"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
 		"tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 8acf5313e835..db70090a08f7 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -1280,7 +1280,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
 		/* Intel-defined (#2) */
-		"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "est",
+		"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
 		"tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,